Checklists for software errors, setup, and tool workflows.

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...

Taskbar Icons Disappeared After Signing Out: Fix Guide

You sign out of Windows, sign back in, and the taskbar icons you pinned are gone—or some system i...

Fix Cloudflare Wildcard Subdomain SSL Not Working

You set up a wildcard SSL certificate for your domain on Cloudflare, but some subdomains still sh...

Nginx Upstream Connection Refused: Diagnosis and Fixes

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

VS Code Debugger Not Hitting Breakpoints in Node.js: Fixes

You set breakpoints in your Node.js code, start the debugger, and the execution runs straight thr...

Debugging Jest Tests in VS Code: Breakpoints Not Hit

You set a breakpoint in a Jest test file, start debugging, and the test runs to completion but th...