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

Cloudflare Origin Certificate Setup for Apache

If you use Cloudflare's proxy (orange cloud), you can set up an origin certificate to encrypt...

Cloudflare 522 Error Checklist: Causes and Fixes

If you see a 522 Connection Timed Out error when visiting your site, Cloudflare ...

How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error

Fix Windows Security App Not Responding: Step-by-Step

You open Windows Security to run a scan or check protection, but the app freezes, shows a blank w...

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Fix npm run build Failed Due to Webpack Configuration

When npm run build fails, the error often points to a webpack configuration issue. T...