Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaS...

Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused

Fix Windows Security App Permission Issues
You open Windows Security and see a message like "This app has been blocked for your protecti...

Fix Docker Permission Denied Errors on Ubuntu
You start a Docker container with a mounted volume, and get a permission denied error when the co...

Fix Node Engine Requirement Not Satisfied Error
You run npm install and see: engine "node" is incompatible with this m...

Fix npm ERR! enoent ENOENT: package.json Not Found in node_modules
You run npm install or npm start and get something like:
...