diff --git a/dev/App/User.js b/dev/App/User.js
index f018ccf55..cc23c5794 100644
--- a/dev/App/User.js
+++ b/dev/App/User.js
@@ -5,7 +5,6 @@ import { isPosNumeric, delegateRunOnDestroy, mailToHelper } from 'Common/UtilsUs
 
 import {
 	Capa,
-	Notification,
 	Scope
 } from 'Common/Enums';
 
@@ -179,13 +178,13 @@ class AppUser extends AbstractApp {
 		MessageUserStore.listError('');
 		Remote.messageList(
 			(iError, oData, bCached) => {
-				if (!iError && oData && oData.Result) {
+				if (iError) {
+					if (Notification.RequestAborted !== iError) {
+						MessageUserStore.list([]);
+						MessageUserStore.listError(getNotification(iError));
+					}
+				} else {
 					MessageUserStore.setMessageList(oData, bCached);
-				} else if (Remote.ABORT !== iError) {
-					MessageUserStore.list([]);
-					MessageUserStore.listError(
-						getNotification((oData && oData.ErrorCode) || Notification.CantGetMessageList)
-					);
 				}
 				MessageUserStore.listLoading(false);
 			},
@@ -273,17 +272,15 @@ class AppUser extends AbstractApp {
 	}
 
 	moveOrDeleteResponseHelper(iError, oData) {
-		if (!iError && FolderUserStore.currentFolder()) {
-			if (oData && isArray(oData.Result) && 2 === oData.Result.length) {
+		if (iError) {
+			setFolderHash(FolderUserStore.currentFolderFullNameRaw(), '');
+			alert(getNotification(iError));
+		} else if (FolderUserStore.currentFolder()) {
+			if (isArray(oData.Result) && 2 === oData.Result.length) {
 				setFolderHash(oData.Result[0], oData.Result[1]);
 			} else {
 				setFolderHash(FolderUserStore.currentFolderFullNameRaw(), '');
-
-				if (oData && [Notification.CantMoveMessage, Notification.CantCopyMessage].includes(oData.ErrorCode)) {
-					alert(getNotification(oData.ErrorCode));
-				}
 			}
-
 			this.reloadMessageList(!MessageUserStore.list.length);
 			this.quotaDebounce();
 		}
@@ -763,7 +760,7 @@ class AppUser extends AbstractApp {
 				autocompleteCallback(
 					data.Result.map(item => (item && item[0] ? new EmailModel(item[0], item[1]) : null)).filter(v => v)
 				);
-			} else if (Remote.ABORT !== iError) {
+			} else if (Notification.RequestAborted !== iError) {
 				autocompleteCallback([]);
 			}
 		}, query);
diff --git a/dev/Common/Enums.js b/dev/Common/Enums.js
index 49cc42a1e..84b7f5598 100644
--- a/dev/Common/Enums.js
+++ b/dev/Common/Enums.js
@@ -77,6 +77,9 @@ export const SaveSettingsStep = {
  * @enum {number}
  */
 export const Notification = {
+	RequestError: 1,
+	RequestAborted: 2,
+
 	InvalidToken: 101,
 	AuthError: 102,
 	ConnectionError: 104,
diff --git a/dev/Common/Translator.js b/dev/Common/Translator.js
index 0fff7abf4..63bcdd4d6 100644
--- a/dev/Common/Translator.js
+++ b/dev/Common/Translator.js
@@ -92,29 +92,17 @@ function getNotificationMessage(code) {
  * @param {*=} defCode = null
  * @returns {string}
  */
-export function getNotification(code, message = '', defCode = null) {
+export function getNotification(code, message = '', defCode = 0) {
 	code = parseInt(code, 10) || 0;
 	if (Notification.ClientViewError === code && message) {
 		return message;
 	}
 
-	defCode = defCode ? parseInt(defCode, 10) || 0 : 0;
 	return getNotificationMessage(code)
-		|| getNotificationMessage(defCode)
+		|| getNotificationMessage(parseInt(defCode, 10))
 		|| '';
 }
 
-/**
- * @param {object} response
- * @param {number} defCode = Notification.UnknownNotification
- * @returns {string}
- */
-export function getNotificationFromResponse(response, defCode = Notification.UnknownNotification) {
-	return response && response.ErrorCode
-		? getNotification(parseInt(response.ErrorCode, 10) || defCode, response.ErrorMessage || '')
-		: getNotification(defCode);
-}
-
 /**
  * @param {*} code
  * @returns {string}
diff --git a/dev/Remote/AbstractFetch.js b/dev/Remote/AbstractFetch.js
index 0e39f2802..631c5fc1b 100644
--- a/dev/Remote/AbstractFetch.js
+++ b/dev/Remote/AbstractFetch.js
@@ -32,11 +32,9 @@ checkResponseError = data => {
 		) {
 			++iJsonErrorCount;
 		}
-		if (window.rl && (data.ClearAuth || data.Logout || 7 < iJsonErrorCount)) {
+		if (data.ClearAuth || data.Logout || 7 < iJsonErrorCount) {
 			rl.hash.clear();
-			if (!data.ClearAuth) {
-				rl.logoutReload();
-			}
+			data.ClearAuth || rl.logoutReload();
 		}
 	}
 },
@@ -116,10 +114,16 @@ export class AbstractFetchRemote
 				}
 
 				if (!iError && data) {
+/*
+					if (sAction !== data.Action) {
+						console.log(sAction + ' !== ' + data.Action);
+					}
+*/
 					if (data.Result) {
 						iJsonErrorCount = iTokenErrorCount = 0;
 					} else {
 						checkResponseError(data);
+						iError = data.ErrorCode || Notification.UnknownError
 					}
 				}
 
diff --git a/dev/Settings/Admin/Packages.js b/dev/Settings/Admin/Packages.js
index 86c2b6669..f2d04f6c1 100644
--- a/dev/Settings/Admin/Packages.js
+++ b/dev/Settings/Admin/Packages.js
@@ -35,14 +35,11 @@ export class PackagesAdminSettings {
 
 	requestHelper(packageToRequest, install) {
 		return (iError, data) => {
-			if (iError || !data || !data.Result) {
-				if (data && data.ErrorCode) {
-					this.packagesError(getNotification(data.ErrorCode));
-				} else {
-					this.packagesError(
-						getNotification(install ? Notification.CantInstallPackage : Notification.CantDeletePackage)
-					);
-				}
+			if (iError) {
+				this.packagesError(
+					getNotification(install ? Notification.CantInstallPackage : Notification.CantDeletePackage)
+//					':\n' + getNotification(iError);
+				);
 			}
 
 			PackageAdminStore.forEach(item => {
@@ -52,7 +49,7 @@ export class PackagesAdminSettings {
 				}
 			});
 
-			if (!iError && data && data.Result && data.Result.Reload) {
+			if (!iError && data.Result.Reload) {
 				location.reload();
 			} else {
 				PackageAdminStore.fetch();
diff --git a/dev/Settings/Admin/Plugins.js b/dev/Settings/Admin/Plugins.js
index e5d4aef44..9c0a3f80a 100644
--- a/dev/Settings/Admin/Plugins.js
+++ b/dev/Settings/Admin/Plugins.js
@@ -60,13 +60,11 @@ export class PluginsAdminSettings {
 	}
 
 	onPluginDisableRequest(iError, data) {
-		if (!iError && data) {
-			if (!data.Result && data.ErrorCode) {
-				if (Notification.UnsupportedPluginPackage === data.ErrorCode && data.ErrorMessage && data.ErrorMessage) {
-					PluginAdminStore.error(data.ErrorMessage);
-				} else {
-					PluginAdminStore.error(getNotification(data.ErrorCode));
-				}
+		if (iError) {
+			if (Notification.UnsupportedPluginPackage === iError && data && data.ErrorMessage) {
+				PluginAdminStore.error(data.ErrorMessage);
+			} else {
+				PluginAdminStore.error(getNotification(iError));
 			}
 		}
 
diff --git a/dev/Settings/User/Filters.js b/dev/Settings/User/Filters.js
index b4016a44c..212302659 100644
--- a/dev/Settings/User/Filters.js
+++ b/dev/Settings/User/Filters.js
@@ -1,6 +1,5 @@
 import ko from 'ko';
 
-import { Notification } from 'Common/Enums';
 import { getNotification } from 'Common/Translator';
 import { addObservablesTo } from 'Common/Utils';
 import { delegateRunOnDestroy } from 'Common/UtilsUser';
@@ -41,7 +40,10 @@ export class FiltersUserSettings {
 				this.loading(false);
 				this.scripts([]);
 
-				if (!iError && data && data.Result) {
+				if (iError) {
+					SieveUserStore.capa([]);
+					this.setError(getNotification(iError));
+				} else {
 					SieveUserStore.capa(data.Result.Capa);
 /*
 					this.scripts(
@@ -52,11 +54,6 @@ export class FiltersUserSettings {
 						value = SieveScriptModel.reviveFromJson(value);
 						value && this.scripts.push(value)
 					});
-				} else {
-					SieveUserStore.capa([]);
-					this.setError(
-						data && data.ErrorCode ? getNotification(data.ErrorCode) : getNotification(Notification.CantGetFilters)
-					);
 				}
 			});
 		}
@@ -73,15 +70,12 @@ export class FiltersUserSettings {
 	deleteScript(script) {
 		this.serverError(false);
 		Remote.filtersScriptDelete(
-			(result, data) => {
-				if (Remote.SUCCESS === result && data && data.Result) {
+			(iError, data) => {
+				if (iError) {
+					this.setError((data && data.ErrorMessageAdditional) || getNotification(iError));
+				} else {
 					this.scripts.remove(script);
 					delegateRunOnDestroy(script);
-				} else {
-					this.setError((data && data.ErrorCode)
-						? (data.ErrorMessageAdditional || getNotification(data.ErrorCode))
-						: getNotification(Notification.CantActivateFiltersScript)
-					);
 				}
 			},
 			script.name()
@@ -92,14 +86,11 @@ export class FiltersUserSettings {
 		let name = script.active() ? '' : script.name();
 		this.serverError(false);
 		Remote.filtersScriptActivate(
-			(result, data) => {
-				if (Remote.SUCCESS === result && data && data.Result) {
-					this.scripts.forEach(script => script.active(script.name() === name));
+			(iError, data) => {
+				if (iError) {
+					this.setError((data && data.ErrorMessageAdditional) || iError)
 				} else {
-					this.setError((data && data.ErrorCode)
-						? (data.ErrorMessageAdditional || getNotification(data.ErrorCode))
-						: getNotification(Notification.CantActivateFiltersScript)
-					);
+					this.scripts.forEach(script => script.active(script.name() === name));
 				}
 			},
 			name
diff --git a/dev/Stores/User/Message.js b/dev/Stores/User/Message.js
index 144f71d54..3d597c676 100644
--- a/dev/Stores/User/Message.js
+++ b/dev/Stores/User/Message.js
@@ -640,15 +640,14 @@ export const MessageUserStore = new class {
 	 * @param {boolean} bCached
 	 */
 	onMessageResponse(iError, oData, bCached) {
-		if (!iError && oData && oData.Result) {
+		if (iError) {
+			if (Notification.RequestAborted !== iError) {
+				this.message(null);
+				this.messageError(getNotification(iError));
+			}
+		} else {
 			this.setMessage(oData, bCached);
-		} else if (Remote.ABORT !== iError) {
-			this.message(null);
-			this.messageError(
-				oData && oData.ErrorCode ? getNotification(oData.ErrorCode) : getNotification(Notification.UnknownError)
-			);
 		}
-
 		this.messageLoading(false);
 	}
 
@@ -663,7 +662,7 @@ export const MessageUserStore = new class {
 	}
 
 	setMessageList(data, cached) {
-		const collection = data && MessageCollectionModel.reviveFromJson(data.Result, cached);
+		const collection = MessageCollectionModel.reviveFromJson(data.Result, cached);
 		if (collection) {
 			let unreadCountChange = false;
 
@@ -715,7 +714,7 @@ export const MessageUserStore = new class {
 		} else {
 			this.listCount(0);
 			this.list([]);
-			this.listError(getNotification(data && data.ErrorCode ? data.ErrorCode : Notification.CantGetMessageList));
+			this.listError(getNotification(Notification.CantGetMessageList));
 		}
 	}
 };
diff --git a/dev/View/Admin/Login.js b/dev/View/Admin/Login.js
index 40decf862..70cc17bb9 100644
--- a/dev/View/Admin/Login.js
+++ b/dev/View/Admin/Login.js
@@ -1,6 +1,5 @@
 import ko from 'ko';
 
-import { Notification } from 'Common/Enums';
 import { Settings } from 'Common/Globals';
 import { getNotification } from 'Common/Translator';
 
@@ -59,17 +58,12 @@ class LoginAdminView extends AbstractViewCenter {
 		this.submitRequest(true);
 
 		Remote.adminLogin(
-			(iError, oData) => {
-				if (!iError && oData && 'AdminLogin' === oData.Action) {
-					if (oData.Result) {
-						rl.route.reload();
-					} else if (oData.ErrorCode) {
-						this.submitRequest(false);
-						this.submitError(getNotification(oData.ErrorCode));
-					}
+			(iError) => {
+				this.submitRequest(false);
+				if (iError) {
+					this.submitError(getNotification(iError));
 				} else {
-					this.submitRequest(false);
-					this.submitError(getNotification(Notification.UnknownError));
+					rl.route.reload();
 				}
 			},
 			this.login(),
diff --git a/dev/View/Popup/Account.js b/dev/View/Popup/Account.js
index 3596c7cd4..bae194ee2 100644
--- a/dev/View/Popup/Account.js
+++ b/dev/View/Popup/Account.js
@@ -1,4 +1,3 @@
-import { Notification } from 'Common/Enums';
 import { getNotification } from 'Common/Translator';
 
 import Remote from 'Remote/User/Fetch';
@@ -48,22 +47,12 @@ class AccountPopupView extends AbstractViewPopup {
 		Remote.accountSetup(
 			(iError, data) => {
 				this.submitRequest(false);
-				if (!iError && data) {
-					if (data.Result) {
-						rl.app.accountsAndIdentities();
-						this.cancelCommand();
-					} else {
-						this.submitError(
-							data.ErrorCode ? getNotification(data.ErrorCode) : getNotification(Notification.UnknownError)
-						);
-
-						if (data.ErrorMessageAdditional) {
-							this.submitErrorAdditional(data.ErrorMessageAdditional);
-						}
-					}
+				if (iError) {
+					this.submitError(getNotification(iError));
+					this.submitErrorAdditional((data && data.ErrorMessageAdditional) || '');
 				} else {
-					this.submitError(getNotification(Notification.UnknownError));
-					this.submitErrorAdditional('');
+					rl.app.accountsAndIdentities();
+					this.cancelCommand();
 				}
 			},
 			this.email(),
diff --git a/dev/View/Popup/Compose.js b/dev/View/Popup/Compose.js
index 0f83b78ae..2caa29f41 100644
--- a/dev/View/Popup/Compose.js
+++ b/dev/View/Popup/Compose.js
@@ -579,28 +579,21 @@ class ComposePopupView extends AbstractViewPopup {
 	}
 
 	sendMessageResponse(iError, data) {
-		let result = false,
-			message = '';
 
 		this.sending(false);
 
-		if (!iError && data && data.Result) {
-			result = true;
-			this.modalVisibility() && this.closeCommand && this.closeCommand();
-		}
-
-		if (this.modalVisibility() && !result) {
-			if (data && Notification.CantSaveMessage === data.ErrorCode) {
-				this.sendSuccessButSaveError(true);
-				this.savedErrorDesc(i18n('COMPOSE/SAVED_ERROR_ON_SEND').trim());
+		if (this.modalVisibility()) {
+			if (iError) {
+				if (Notification.CantSaveMessage === iError) {
+					this.sendSuccessButSaveError(true);
+					this.savedErrorDesc(i18n('COMPOSE/SAVED_ERROR_ON_SEND').trim());
+				} else {
+					this.sendError(true);
+					this.sendErrorDesc(getNotification(iError, data && data.ErrorMessage)
+						|| getNotification(Notification.CantSendMessage));
+				}
 			} else {
-				message = getNotification(
-					data && data.ErrorCode ? data.ErrorCode : Notification.CantSendMessage,
-					data && data.ErrorMessage ? data.ErrorMessage : ''
-				);
-
-				this.sendError(true);
-				this.sendErrorDesc(message || getNotification(Notification.CantSendMessage));
+				this.closeCommand && this.closeCommand();
 			}
 		}
 
diff --git a/dev/View/Popup/Contacts.js b/dev/View/Popup/Contacts.js
index 7a6e95bc7..39fb0db49 100644
--- a/dev/View/Popup/Contacts.js
+++ b/dev/View/Popup/Contacts.js
@@ -2,7 +2,6 @@ import ko from 'ko';
 
 import {
 	SaveSettingsStep,
-	Notification,
 	Scope
 } from 'Common/Enums';
 
@@ -255,10 +254,8 @@ class ContactsPopupView extends AbstractViewPopup {
 	}
 
 	syncCommand() {
-		rl.app.contactsSync((iError, data) => {
-			if (iError || !data || !data.Result) {
-				alert(getNotification(data && data.ErrorCode ? data.ErrorCode : Notification.ContactsSyncError));
-			}
+		rl.app.contactsSync(iError => {
+			iError && alert(getNotification(iError));
 
 			this.reloadContactList(true);
 		});
diff --git a/dev/View/Popup/Domain.js b/dev/View/Popup/Domain.js
index 5921b02bb..0a086c929 100644
--- a/dev/View/Popup/Domain.js
+++ b/dev/View/Popup/Domain.js
@@ -1,6 +1,5 @@
-import { Notification } from 'Common/Enums';
 import { pInt, pString } from 'Common/Utils';
-import { i18n } from 'Common/Translator';
+import { i18n, getNotification } from 'Common/Translator';
 
 import Remote from 'Remote/Admin/Fetch';
 
@@ -248,17 +247,13 @@ class DomainPopupView extends AbstractViewPopup {
 		}
 	}
 
-	onDomainCreateOrSaveResponse(iError, oData) {
+	onDomainCreateOrSaveResponse(iError) {
 		this.saving(false);
-		if (!iError && oData) {
-			if (oData.Result) {
-				DomainAdminStore.fetch();
-				this.closeCommand();
-			} else if (Notification.DomainAlreadyExists === oData.ErrorCode) {
-				this.savingError(i18n('ERRORS/DOMAIN_ALREADY_EXISTS'));
-			}
+		if (iError) {
+			this.savingError(getNotification(iError));
 		} else {
-			this.savingError(i18n('ERRORS/UNKNOWN_ERROR'));
+			DomainAdminStore.fetch();
+			this.closeCommand();
 		}
 	}
 
diff --git a/dev/View/Popup/DomainAlias.js b/dev/View/Popup/DomainAlias.js
index d36c6e2d6..cecd86acb 100644
--- a/dev/View/Popup/DomainAlias.js
+++ b/dev/View/Popup/DomainAlias.js
@@ -1,7 +1,6 @@
 import ko from 'ko';
 
-import { Notification } from 'Common/Enums';
-import { i18n } from 'Common/Translator';
+import { getNotification } from 'Common/Translator';
 
 import { DomainAdminStore } from 'Stores/Admin/Domain';
 
@@ -29,8 +28,6 @@ class DomainAliasPopupView extends AbstractViewPopup {
 
 		this.canBeSaved = ko.computed(() => !this.saving() && this.name() && this.alias());
 
-		this.onDomainAliasCreateOrSaveResponse = this.onDomainAliasCreateOrSaveResponse.bind(this);
-
 		decorateKoCommands(this, {
 			createCommand: self => self.canBeSaved()
 		});
@@ -38,21 +35,15 @@ class DomainAliasPopupView extends AbstractViewPopup {
 
 	createCommand() {
 		this.saving(true);
-		Remote.createDomainAlias(this.onDomainAliasCreateOrSaveResponse, this.name(), this.alias());
-	}
-
-	onDomainAliasCreateOrSaveResponse(iError, data) {
-		this.saving(false);
-		if (!iError && data) {
-			if (data.Result) {
+		Remote.createDomainAlias(iError => {
+			this.saving(false);
+			if (iError) {
+				this.savingError(getNotification(iError));
+			} else {
 				DomainAdminStore.fetch();
 				this.closeCommand();
-			} else if (Notification.DomainAlreadyExists === data.ErrorCode) {
-				this.savingError(i18n('ERRORS/DOMAIN_ALREADY_EXISTS'));
 			}
-		} else {
-			this.savingError(i18n('ERRORS/UNKNOWN_ERROR'));
-		}
+		}, this.name(), this.alias());
 	}
 
 	onShow() {
diff --git a/dev/View/Popup/FolderClear.js b/dev/View/Popup/FolderClear.js
index 58ab0cc9d..bcfe7dc7f 100644
--- a/dev/View/Popup/FolderClear.js
+++ b/dev/View/Popup/FolderClear.js
@@ -1,4 +1,3 @@
-import { Notification } from 'Common/Enums';
 import { i18n, getNotification } from 'Common/Translator';
 import { setFolderHash } from 'Common/Cache';
 
@@ -54,17 +53,13 @@ class FolderClearPopupView extends AbstractViewPopup {
 
 			setFolderHash(folderToClear.fullNameRaw, '');
 
-			Remote.folderClear((iError, data) => {
+			Remote.folderClear(iError => {
 				this.clearingProcess(false);
-				if (!iError && data && data.Result) {
+				if (iError) {
+					this.clearingError(getNotification(iError));
+				} else {
 					rl.app.reloadMessageList(true);
 					this.cancelCommand();
-				} else {
-					if (data && data.ErrorCode) {
-						this.clearingError(getNotification(data.ErrorCode));
-					} else {
-						this.clearingError(getNotification(Notification.MailServerError));
-					}
 				}
 			}, folderToClear.fullNameRaw);
 		}
diff --git a/dev/View/Popup/Identity.js b/dev/View/Popup/Identity.js
index 68e740fad..65f18e5a6 100644
--- a/dev/View/Popup/Identity.js
+++ b/dev/View/Popup/Identity.js
@@ -1,4 +1,3 @@
-import { Notification } from 'Common/Enums';
 import { getNotification } from 'Common/Translator';
 
 import Remote from 'Remote/User/Fetch';
@@ -96,17 +95,13 @@ class IdentityPopupView extends AbstractViewPopup {
 		this.submitRequest(true);
 
 		Remote.identityUpdate(
-			(iError, data) => {
+			iError => {
 				this.submitRequest(false);
-				if (!iError && data) {
-					if (data.Result) {
-						rl.app.accountsAndIdentities();
-						this.cancelCommand();
-					} else if (data.ErrorCode) {
-						this.submitError(getNotification(data.ErrorCode));
-					}
+				if (iError) {
+					this.submitError(getNotification(iError));
 				} else {
-					this.submitError(getNotification(Notification.UnknownError));
+					rl.app.accountsAndIdentities();
+					this.cancelCommand();
 				}
 			},
 			this.id,
diff --git a/dev/View/Popup/Plugin.js b/dev/View/Popup/Plugin.js
index 283b1a102..adae75ffa 100644
--- a/dev/View/Popup/Plugin.js
+++ b/dev/View/Popup/Plugin.js
@@ -1,6 +1,6 @@
 import ko from 'ko';
 
-import { Scope, Notification } from 'Common/Enums';
+import { Scope } from 'Common/Enums';
 import { getNotification, i18n } from 'Common/Translator';
 import { isNonEmptyArray } from 'Common/Utils';
 
@@ -53,16 +53,11 @@ class PluginPopupView extends AbstractViewPopup {
 		Remote.pluginSettingsUpdate(this.onPluginSettingsUpdateResponse, list);
 	}
 
-	onPluginSettingsUpdateResponse(iError, data) {
-		if (!iError && data && data.Result) {
-			this.cancelCommand();
+	onPluginSettingsUpdateResponse(iError) {
+		if (iError) {
+			this.saveError(getNotification(iError));
 		} else {
-			this.saveError('');
-			if (data && data.ErrorCode) {
-				this.saveError(getNotification(data.ErrorCode));
-			} else {
-				this.saveError(getNotification(Notification.CantSavePluginSettings));
-			}
+			this.cancelCommand();
 		}
 	}
 
diff --git a/dev/View/Popup/SieveScript.js b/dev/View/Popup/SieveScript.js
index c3c849274..ab15918e5 100644
--- a/dev/View/Popup/SieveScript.js
+++ b/dev/View/Popup/SieveScript.js
@@ -1,6 +1,5 @@
 import ko from 'ko';
 
-import { Notification } from 'Common/Enums';
 import { getNotification, i18nToNodes } from 'Common/Translator';
 import { addObservablesTo } from 'Common/Utils';
 import { delegateRunOnDestroy } from 'Common/UtilsUser';
@@ -61,16 +60,13 @@ class SieveScriptPopupView extends AbstractViewPopup {
 				(iError, data) => {
 					self.saving = false;
 
-					if (!iError && data && data.Result) {
+					if (iError) {
+						self.saveError(true);
+						self.saveErrorText((data && data.ErrorMessageAdditional) || getNotification(iError));
+					} else {
 						script.exists() || SieveUserStore.scripts.push(script);
 						script.exists(true);
 						script.hasChanges(false);
-					} else {
-						self.saveError(true);
-						self.saveErrorText((data && data.ErrorCode)
-							? (data.ErrorMessageAdditional || getNotification(data.ErrorCode))
-							: getNotification(Notification.CantSaveFilters)
-						);
 					}
 				},
 				script
diff --git a/dev/View/Popup/Template.js b/dev/View/Popup/Template.js
index c8581f4f6..08fc82552 100644
--- a/dev/View/Popup/Template.js
+++ b/dev/View/Popup/Template.js
@@ -1,4 +1,3 @@
-import { Notification } from 'Common/Enums';
 import { getNotification } from 'Common/Translator';
 import { HtmlEditor } from 'Common/Html';
 
@@ -53,17 +52,13 @@ class TemplatePopupView extends AbstractViewPopup {
 		this.submitRequest(true);
 
 		Remote.templateSetup(
-			(iError, data) => {
+			iError => {
 				this.submitRequest(false);
-				if (!iError && data) {
-					if (data.Result) {
-						rl.app.templates();
-						this.cancelCommand();
-					} else if (data.ErrorCode) {
-						this.submitError(getNotification(data.ErrorCode));
-					}
+				if (iError) {
+					this.submitError(getNotification(iError));
 				} else {
-					this.submitError(getNotification(Notification.UnknownError));
+					rl.app.templates();
+					this.cancelCommand();
 				}
 			},
 			this.id(),
diff --git a/dev/View/User/Login.js b/dev/View/User/Login.js
index 33f82371d..f9a3d4593 100644
--- a/dev/View/User/Login.js
+++ b/dev/View/User/Login.js
@@ -6,7 +6,7 @@ import {
 
 import { ClientSideKeyName } from 'Common/EnumsUser';
 
-import { getNotification, getNotificationFromResponse, reload as translatorReload, convertLangName } from 'Common/Translator';
+import { getNotification, reload as translatorReload, convertLangName } from 'Common/Translator';
 
 import { LanguageStore } from 'Stores/Language';
 
@@ -150,36 +150,21 @@ class LoginUserView extends AbstractViewCenter {
 		const fLoginRequest = (sLoginPassword) => {
 			Remote.login(
 				(iError, oData) => {
-					if (!iError && oData && 'Login' === oData.Action) {
-						if (oData.Result) {
-							if (oData.TwoFactorAuth) {
-								this.additionalCode('');
-								this.additionalCodeVisibility(true);
-								this.submitRequest(false);
-
-								setTimeout(() => this.querySelector('.inputAdditionalCode').focus(), 100);
-							} else {
-								rl.route.reload();
-							}
-						} else if (oData.ErrorCode) {
-							this.submitRequest(false);
-							if ([Notification.InvalidInputArgument].includes(oData.ErrorCode)) {
-								oData.ErrorCode = Notification.AuthError;
-							}
-
-							this.submitError(getNotificationFromResponse(oData));
-
-							if (!this.submitError()) {
-								this.submitError(getNotification(Notification.UnknownError));
-							} else if (oData.ErrorMessageAdditional) {
-								this.submitErrorAddidional(oData.ErrorMessageAdditional);
-							}
-						} else {
-							this.submitRequest(false);
+					this.submitRequest(false);
+					if (iError) {
+						if (Notification.InvalidInputArgument == iError) {
+							iError = Notification.AuthError;
 						}
+						this.submitError(getNotification(iError, oData.ErrorMessage, Notification.UnknownNotification));
+						this.submitErrorAddidional((oData && oData.ErrorMessageAdditional) || '');
 					} else {
-						this.submitRequest(false);
-						this.submitError(getNotification(Notification.UnknownError));
+						if (oData.TwoFactorAuth) {
+							this.additionalCode('');
+							this.additionalCodeVisibility(true);
+							setTimeout(() => this.querySelector('.inputAdditionalCode').focus(), 100);
+						} else {
+							rl.route.reload();
+						}
 					}
 				},
 				this.email(),
diff --git a/dev/bootstrap.js b/dev/bootstrap.js
index 28cc47620..f93cc88b2 100644
--- a/dev/bootstrap.js
+++ b/dev/bootstrap.js
@@ -37,8 +37,7 @@ export default (App) => {
 		StorageResultType: {
 			Success: 0,
 			Error: 1,
-			Abort: 2,
-			Unload: 3
+			Abort: 2
 		}
 	};
 
diff --git a/plugins/change-password/js/ChangePasswordUserSettings.js b/plugins/change-password/js/ChangePasswordUserSettings.js
index 9f416d91f..8592b6b9e 100644
--- a/plugins/change-password/js/ChangePasswordUserSettings.js
+++ b/plugins/change-password/js/ChangePasswordUserSettings.js
@@ -108,25 +108,21 @@
 
 		onChangePasswordResponse(iError, data) {
 			this.reset(false);
-			if (!iError && data && data.Result) {
+			if (iError) {
+				this.passwordUpdateError(true);
+				if (131 === iError) {
+					// Notification.CurrentPasswordIncorrect
+					this.currentPasswordError(true);
+				}
+				this.errorDescription((data && data.ErrorMessageAdditional)
+					|| rl.i18n('NOTIFICATIONS/COULD_NOT_SAVE_NEW_PASSWORD'));
+			} else {
 				this.currentPassword('');
 				this.newPassword('');
 				this.newPassword2('');
 				this.passwordUpdateSuccess(true);
 				rl.hash.set();
 				rl.settings.set('AuthAccountHash', data.Result);
-			} else {
-				this.passwordUpdateError(true);
-				this.errorDescription(rl.i18n('NOTIFICATIONS/COULD_NOT_SAVE_NEW_PASSWORD'));
-				if (data) {
-					if (131 === data.ErrorCode) {
-						// Notification.CurrentPasswordIncorrect
-						this.currentPasswordError(true);
-					}
-					if (data.ErrorMessageAdditional) {
-						this.errorDescription(data.ErrorMessageAdditional);
-					}
-				}
 			}
 		}
 	}
diff --git a/plugins/custom-admin-settings-tab/js/CustomAdminSettings.js b/plugins/custom-admin-settings-tab/js/CustomAdminSettings.js
index 94ee0897f..20bd0d6f5 100644
--- a/plugins/custom-admin-settings-tab/js/CustomAdminSettings.js
+++ b/plugins/custom-admin-settings-tab/js/CustomAdminSettings.js
@@ -22,11 +22,11 @@
 
 		this.loading(true);
 
-		rl.pluginRemoteRequest(function (iError, oData) {
+		rl.pluginRemoteRequest((iError, oData) => {
 
 			self.loading(false);
 
-			if (!iError && oData && oData.Result) {
+			if (!iError) {
 				self.php(oData.Result.PHP || '');
 			}
 
diff --git a/plugins/custom-settings-tab/js/CustomUserSettings.js b/plugins/custom-settings-tab/js/CustomUserSettings.js
index 127082a18..85b7f5241 100644
--- a/plugins/custom-settings-tab/js/CustomUserSettings.js
+++ b/plugins/custom-settings-tab/js/CustomUserSettings.js
@@ -33,11 +33,11 @@
 
 		this.saving(true);
 
-		rl.pluginRemoteRequest(function (iError, oData) {
+		rl.pluginRemoteRequest((iError, oData) => {
 
 			self.saving(false);
 
-			if (!iError && oData && oData.Result)
+			if (!iError)
 			{
 				// true
 			}
@@ -61,11 +61,11 @@
 
 		this.loading(true);
 
-		rl.pluginRemoteRequest(function (iError, oData) {
+		rl.pluginRemoteRequest((iError, oData) => {
 
 			self.loading(false);
 
-			if (!iError && oData && oData.Result)
+			if (!iError)
 			{
 				self.userSkype(oData.Result.UserSkype || '');
 				self.userFacebook(oData.Result.UserFacebook || '');