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## Environment

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* Elixir & Erlang/OTP versions (elixir --version): 
* Operating system: 
* How have you started Livebook (mix phx.server, livebook CLI, Docker, etc): 
* Livebook version (use `git rev-parse HEAD` if running with mix): 
* Browsers that reproduce this bug (the more the merrier): 
* Include what is logged in the browser console: 
* Include what is logged to the server console:

## Current behavior

Include detailed steps to reproduce error, errors and stacktraces if appropriate.

## Expected behavior

A short description on how you expect the code to behave.