Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You might see a warning that Windows Defender can't update because of an SSL certificate error. T...

You run pip install numpy and get ERROR: Could not find a version that satisfi...

Fix Chrome Profile Sync Stuck on Sign In
You open Chrome, try to sign in to sync your profile, and the spinner just keeps spinning. Or you...

How to Fix npm install ENOENT Package JSON Error
When you run npm install and get an ENOENT error mentioning package.json, it usually...

Fix Nginx 502 Bad Gateway for WordPress
If you see a 502 Bad Gateway error when visiting your WordPress site running on Nginx, it usually...

Fix Go Proxy Not Working with Private Repository
When you run go get or go mod download and get errors like 410 Go...