Checklists for software errors, setup, and tool workflows.

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

How to Fix Cloudflare Error 521: Server Not Responding

Cloudflare error 521 appears when your origin server refuses the connection from Cloudflare's...

Fix Edge Sync Not Syncing Tabs Across Devices

You open a tab on your desktop, but it doesn't show up on your phone or laptop. This is a com...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer

You run git clone https://example.com/repo.git and get:

fatal: unable to acc...

VSCode IntelliSense Not Working for JavaScript: Fixes

You open a JavaScript file in VSCode, but IntelliSense is silent — no autocompletions, no suggest...

Fix VS Code Source Control Not Detecting Changes on Windows 11

If you're using VS Code on Windows 11 and the Source Control panel isn't showing your fil...