Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

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Latest checklists

If you see Permission denied when running commands in the VS Code integrated termina...

If you see the error error: externally-managed-environment when running pip in...

How to Manually Activate a Python Virtual Environment
You've created a Python virtual environment but can't get it to activate. This guide walk...

Fixing Docker Pull Access Denied in Docker Desktop
You try to pull a Docker image in Docker Desktop and see access denied. This usually...

Fix npm run build Failed with PostCSS Error
You run npm run build and see a PostCSS error. This often happens after updating pac...

Fix Nginx Upstream Connection Refused Socket Error
When Nginx returns a 502 Bad Gateway or logs upstream connection refused