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

Fix VS Code Breakpoint Not Hit in Express App

You set a breakpoint in your Express route handler, start debugging, and the breakpoint is never ...

How to Fix Edge Sync Stuck on Preparing Sync

You open Microsoft Edge, click your profile, and see 'Preparing sync' — but it never fini...

Fix npm run build Failed on Windows: Common Causes and Solutions

When you run npm run build on Windows and it fails, the error message can be cryptic...

How to Fix Cloudflare 521 Error During Setup

If you see a 521 error after setting up Cloudflare, it means your origin server refused the conne...

How to Fix Chrome Sync Error 'Sign In Again'

What the Error Means

When Chrome displays 'Sign in again' in the sync settings, i...

Nginx Redirect Loop: Common Causes and Fixes

You set up a redirect in nginx, but now your browser shows 'redirect loop' or 'too ma...