Checklists for software errors, setup, and tool workflows.

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 Nginx Upstream Connection Refused Error

If you're seeing upstream connection refused in your Nginx error logs, it usuall...

Fix Firefox Secure Connection Failed After Update

After a Firefox update, you might see a "Secure Connection Failed" error when visiting we...

Chrome Sync Not Working on Work Network: Fixes to Try

If Chrome sync stops working when you're connected to your work network, the problem is often...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer Certificate

You’re trying to clone or push to a remote repository over HTTPS and Git throws an error like

Fix Python UnicodeDecodeError 'charmap' Codec

You're reading a file in Python and get:

UnicodeDecodeError: 'charmap' ...