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

Fix Nginx Redirect Loop: Permanent Solutions

You're trying to reach a site, and the browser keeps bouncing between two URLs until it gives...

Windows 11 Bluetooth Not Finding Devices: Practical Fixes

If your Windows 11 PC suddenly stops detecting Bluetooth devices—like headphones, keyboards, or m...

Fix pip Externally Managed Environment Error with pipx

If you're on a modern Linux distribution (like Ubuntu 23.04+, Fedora 38+, or Debian 12+) and ...

Fix Discord Black Screen from Chrome Hardware Acceleration

Why Chrome Hardware Acceleration Causes Discord Black Screen

When Chrome uses hardware a...

Fix ERR_CERT_AUTHORITY_INVALID on Localhost

When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

How to Fix Cloudflare 521 Error with Wildcard Subdomains

If you're seeing a Cloudflare 521 error on a wildcard subdomain (e.g., *.example.com), the or...