Checklists for software errors, setup, and tool workflows.

1. Reproduce

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3. Apply

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Latest checklists

If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...

Fix VS Code Terminal Not Opening on Windows 10
When you press Ctrl+` or click the Terminal panel in VS Code and nothing happens, it's usuall...

Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Fix Windows 11 Installation Assistant Stuck at 99%
You're upgrading to Windows 11 using the Installation Assistant, and it gets stuck at 99% for...

Docker Container Exits Immediately: No Error, Common Fixes
You run docker run and the container starts, then exits within a second. No error me...

Fix Python UnicodeDecodeError: Bytes to String
You're reading a file or receiving network data in Python and hit UnicodeDecodeError: &...