Troubleshooting
Symptoms, causes and fixes for problems worth remembering.
~1 min read updated Jul 17, 2026 Troubleshooting
Problems I’ve hit and solved, written down so I never lose an hour to the same error twice.
In this section
Markdown Showcase
Every formatting feature this knowledge base supports, on one page — a living reference and rendering test.
Fixing CORS Errors
What a CORS error actually means and how to fix it — on the server, where it belongs.