Checklists for software errors, setup, and tool workflows.

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Fix Git SSL Certificate Problem: Unable to Get Local Issuer

When Git reports SSL certificate problem: unable to get local issuer certificate, it...

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Fix Explorer.exe Keeps Restarting in Windows 10

If your File Explorer (explorer.exe) keeps restarting on Windows 10, you'll see the taskbar a...

Fix Firefox Secure Connection Failed on Mac

If you see "Secure Connection Failed" in Firefox on your Mac, the browser is blocking the...

Fix Firefox Secure Connection Failed on Windows 10

You're browsing in Firefox on Windows 10 and get a full-page error: Secure Connection Fai...

VS Code Git Not Detecting Changes in Workspace: Fixes
You open VS Code, make edits, and expect to see them in the Source Control panel. But nothing sho...