Checklists for software errors, setup, and tool workflows.

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

Fix Docker Desktop Engine Not Running on Windows

You open Docker Desktop on Windows, see the whale icon stuck in the system tray, and the engine s...

VSCode Python Debugger Breakpoint Not Stopping: Fixes

You set a breakpoint in VSCode, start debugging, and execution passes right through it. The debug...

Cloudflare Error 521: Web Server Down Checklist

Cloudflare error 521 means your origin web server refused the connection. This is not a Cloudflar...

Fix Windows Security App Blocked by Antivirus

You open Windows Security (formerly Windows Defender) only to see an error or blank screen becaus...

How to Fix Cloudflare SSL Full Strict Error

If you see a Cloudflare SSL error when using Full (Strict) mode, your origin server is not presen...