diff --git a/app/models/zip_export.rb b/app/models/zip_export.rb
index 6706662a8..83e0f955f 100644
--- a/app/models/zip_export.rb
+++ b/app/models/zip_export.rb
@@ -49,7 +49,7 @@ class ZipExport < ApplicationRecord
   end
 
   def zip_file_name
-    return '' unless file.attached?
+    return '' unless zip_file.attached?
 
     zip_file.blob&.filename&.to_s
   end
diff --git a/app/services/projects_overview_service.rb b/app/services/projects_overview_service.rb
index 082c0b589..78edc42cd 100644
--- a/app/services/projects_overview_service.rb
+++ b/app/services/projects_overview_service.rb
@@ -84,7 +84,9 @@ class ProjectsOverviewService
     ).joins(
       "LEFT OUTER JOIN (#{due_modules.to_sql}) due_modules "\
       "ON due_modules.experiment_id = experiments.id"
-    ).left_outer_joins(:user_projects, :project_comments)
+    ).joins(
+      'LEFT OUTER JOIN user_projects ON user_projects.project_id = projects.id'
+    ).left_outer_joins(:project_comments)
 
     # Only admins see all projects of the team
     unless @user.is_admin_of_team?(@team)
diff --git a/spec/services/repository_zip_export_spec.rb b/spec/services/repository_zip_export_spec.rb
index 9cd4fb167..8e5699810 100644
--- a/spec/services/repository_zip_export_spec.rb
+++ b/spec/services/repository_zip_export_spec.rb
@@ -71,7 +71,8 @@ describe RepositoryZipExport, type: :background_job do
       ZipExport.skip_callback(:create, :after, :self_destruct)
       RepositoryZipExport.generate_zip(params, repository, user)
       csv_zip_file = ZipExport.first.zip_file
-      parsed_csv_content = Zip::File.open(csv_zip_file.path) do |zip_file|
+      file_path = ActiveStorage::Blob.service.public_send(:path_for, csv_zip_file.key)
+      parsed_csv_content = Zip::File.open(file_path) do |zip_file|
         csv_file = zip_file.glob('*.csv').first
         csv_content = csv_file.get_input_stream.read
         CSV.parse(csv_content, headers: true)
diff --git a/spec/services/templates_service_spec.rb b/spec/services/templates_service_spec.rb
index c088300f4..7d119500b 100644
--- a/spec/services/templates_service_spec.rb
+++ b/spec/services/templates_service_spec.rb
@@ -50,7 +50,7 @@ describe TemplatesService do
             tmpl_res = tmpl_task.results.find_by_name(demo_res.name)
             expect(tmpl_res.name).to eq(demo_res.name)
             if demo_res.asset
-              expect(tmpl_res.asset.file.exists?).to eq(true)
+              expect(tmpl_res.asset.file.attached?).to eq(true)
               expect(demo_res.asset.file_file_name)
                 .to eq(tmpl_res.asset.file_file_name)
             elsif demo_res.table
@@ -75,7 +75,7 @@ describe TemplatesService do
                 .to match_array(tmpl_step.assets.pluck(:file_file_name))
             end
             tmpl_step.assets.each do |asset|
-              expect(asset.file.exists?).to eq(true)
+              expect(asset.file.attached?).to eq(true)
             end
             if demo_step.tables.present?
               expect(demo_step.tables.pluck(:contents))