Hey, thanks for the report and the screenshot. I can see the Models settings section with the OpenAI API Key field.
This is a known issue in 3.15.x. The API Key and Override Base URL fields don’t get focus when you click them. It’s fixed in 3.15.20, so please update Cursor via Help > Check for Updates, or reinstall the latest build, and the fields should work again.
If you can’t update yet, here’s a workaround. Click next to the field and press Tab to move focus into the input, then type or paste the value as usual.
Let me know if the issue still happens after updating.