Checklists for software errors, setup, and tool workflows.

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Latest checklists

You're reading a file in Python and get:

UnicodeDecodeError: 'charmap' ...

Fix Nginx Upstream Connection Refused Timeout Error
When Nginx returns 502 Bad Gateway or logs upstream connection refused timeout...

Fix Firefox Secure Connection Failed on Mac
If you see "Secure Connection Failed" in Firefox on your Mac, the browser is blocking the...

Git index.lock File Exists Even After Deleting: Fixes
You delete the .git/index.lock file, but Git still says it exists. This can happen d...

How to Fix 'Permission Denied' When Saving Files in VS Code
You're editing a file in VS Code, hit save, and get a 'permission denied' error. This...

Fix Nginx Redirect Loop Caused by Rewrite Rules
Redirect loops in Nginx often appear as endless redirects between two URLs or as a browser error ...