Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

How to Fix PostgreSQL Connection Refused on Localhost

You try to connect to PostgreSQL on localhost and get connection refused. This usual...

Fix PowerShell 502 Bad Gateway Certificate Errors

When you run a PowerShell script that makes an HTTPS request, you might see a 502 Bad Gateway err...

How to Fix Chrome Module Not Found Error

You're working in Chrome and suddenly a page shows 'module not found' or a script fails with a mo...

Fix Firefox Not Responding When Opening a New Tab

You click the new tab button (or press Ctrl+T) and Firefox freezes, goes white, or shows a spinni...

Fix 'Syntax Error Near Unexpected Token' When Activating venv

When you try to activate a Python virtual environment on Linux or macOS and see bash: synta...

Fix Chrome Profile Dependency Conflict During Sync
You try to sign in to Chrome or enable sync, but you get an error like "Profile dependency confli...