Knowledge base for software setup, errors, and daily tool work.

Fix Chrome Black Screen During Videos: Hardware Acceleration

If you're watching a video in Chrome and the screen goes black (but audio continues), hardwar...

Fixing Cloudflare 521 Error: Enable Origin Pull Setup

If you see a Cloudflare 521 error, it means Cloudflare can't connect to your origin server. O...

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

Symptom

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

How to Fix Cloudflare 522 Error: Origin Server Timeout

If you see a Cloudflare 522 error, it means your origin server didn't respond in time. This u...

Fix Cloudflare Wildcard Subdomain DNS Propagation Delay

You set up a wildcard DNS record (e.g., *.example.com) in Cloudflare, but new subdom...