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

Cloudflare 521 Error: Server Timeout – Causes and Fixes

Cloudflare 521 error indicates the web server is down or unreachable. It appears as “web server i...

Chrome Black Screen Fix When Hardware Acceleration Is On

If Chrome shows a black screen, flickers, or freezes after you enable hardware acceleration, you&...

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

Symptom

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

Fix Git Clone Connection Timed Out on AWS CodeCommit

If you're seeing git clone connection timed out when trying to clone a repositor...

Fix Nginx Upstream Connection Refused in Proxy Pass