Checklists for software errors, setup, and tool workflows.

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Latest checklists

You click "Check for updates" or restart to install, and the progress bar sits at 0% for ...

You try to merge two branches in Git, and get fatal: refusing to merge unrelated histories<...

Fix ENOENT Error: package.json Not Found in React App
When running npm start or npm install in a React app, you may see an er...

Fix Firefox Secure Connection Failed Error (Mozilla)
When Firefox shows 'Secure Connection Failed' and a message like MOZILLA_PKIX_ERROR_<...

How to Fix Git index.lock File Exists Error on Mac
If you're working with Git on a Mac and see the error fatal: Unable to create '/pat...

Git Push Rejected Non Fast Forward: Troubleshooting Checklist
If you see ! [rejected]        main -> main (non-fast-forward) when running