Checklists for software errors, setup, and tool workflows.

Fix Nginx Upstream Connection Refused & Upstream Not Found

When you see upstream connection refused or upstream not found in your ...

Fix pnpm install ETIMEDOUT Errors: Network & Config Checks

When you run pnpm install and it fails with ETIMEDOUT, it usually means...

Chrome Startup Crash When Opened from Task Manager

You click 'Run new task' in Task Manager, type 'chrome', hit Enter, and Chrome cr...

Fix 'package.json Not Found' After Cloning a Repository

Symptom

You clone a repository from GitHub (or another remote), change into the directory...

Fix Cloudflare Origin Certificate Mismatch Errors

If you see 'Origin Certificate Mismatch' in Cloudflare or browser warnings, it usually me...

How to Fix Node.js Heap Out of Memory Error

You’re running a Node.js script and it crashes with FATAL ERROR: CALL_AND_RETRY_LAST Alloca...