Checklists for software errors, setup, and tool workflows.

Fix ERR_CERT_AUTHORITY_INVALID on Localhost

When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

Fix 'git remote origin already exists' Error on Mac

If you see fatal: remote origin already exists when trying to add a remote repositor...

Fix Python Dependency Conflicts After an Update

You updated your Python environment or a package, and now your script throws import errors or ver...

Fix Windows Update Error 0x80070002 on Windows 11

If you see error 0x80070002 when running Windows Update on Windows 11, it usually means Windows c...

Fix Chrome Hardware Acceleration Black Screen in Windows 11

If Chrome shows a black screen on Windows 11, especially after an update or when playing video, h...

Fix npm ERR! enoent ENOENT: package.json Not Found in node_modules

You run npm install or npm start and get something like:

...