Checklists for software errors, setup, and tool workflows.

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Fix ENOENT Error: package.json Not Found in React App

When running npm start or npm install in a React app, you may see an er...

Fix npm ENOWENT Package.json Not Found on Mac

If you see 'ENOENT: no such file or directory, open /path/to/package.json' when running n...

Fix Cloudflare Origin Certificate with Let's Encrypt

If your origin server is rejecting the Cloudflare origin certificate—perhaps because of a SAN mis...

Node Sass Build Failed: Complete Troubleshooting Checklist

When you see "Node Sass does not yet support your current environment" or a build failure...

Fix 'nginx -t test failed no such file or directory' Error

When running nginx -t to test configuration, you may encounter the error nginx...

Fix DNS Probe Finished NXDOMAIN on Custom DNS Server
If you see “DNS PROBE FINISHED NXDOMAIN” in Chrome or another browser while using a custom DNS se...