Checklists for software errors, setup, and tool workflows.

Fix Git Lock File Not Deleted After Crash

If Git reports a lock file error after a crash, it usually means a previous Git operation was int...

Python Virtual Environment Not Activating: Common Fixes

You run source venv/bin/activate (or venv\Scripts\activate on Windows) ...

Chrome Certificate Error Invalid Authority: Diagnosis Checklist

When Chrome shows NET::ERR_CERT_AUTHORITY_INVALID and refuses to load a site, it...

Fix npm run build Failed After Git Pull

You pulled the latest code from Git, ran npm run build, and got errors. This is a co...

How to Enable Chrome Extensions That Aren't Loading

You open Chrome and see a grayed-out extension icon. Clicking 'Enable' does nothing, or t...

Fix Git SSL Certificate Error: Unable to Get Local Issuer Certificate

When cloning or pulling from a Git repository, you may see:

fatal: unable to access...