Checklists for software errors, setup, and tool workflows.

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Latest checklists

You run npm run build and get an error like Error: Cannot find module 'som...

Fix Firefox Secure Connection Failed Due to Proxy Settings
If you see "Secure Connection Failed" in Firefox and suspect a proxy is involved, you'...

How to Set Node.js Max Heap Size Permanently
If your Node.js process crashes with memory errors like FATAL ERROR: CALL_AND_RETRY_LAST Al...

Fixing Nginx Upstream Connection Refused and Permission Denied
If you see connect() failed (111: Connection refused) or connect() failed (13:...

Chrome Startup Crash: Registry Fix Guide
If Chrome closes immediately after opening or shows a blank window before crashing, the problem i...

How to Fix the Git index.lock File Exists Error
You're in the middle of a Git operation—commit, merge, or rebase—and Git stops with: fa...