No change to workstation. But all of a sudden all models unreachable with "the model returned an error"

Thanks for reporting a bug you have found in Cursor!
Please add the following info to help us diagnose your issue:

:white_check_mark: Check the forum to ensure the issue hasn’t been reported already
:lady_beetle: Provide a clear description of the bug —> error message appears
:counterclockwise_arrows_button: Explain how to reproduce the bug (if known) —> just trying to use agent with any model. issue started about 15 minutes ago
:camera: Attach screenshots or recordings (e.g., .jpg, .png, .mp4).
:laptop: Tell us your operating system and your Cursor version (e.g., Windows, 0.x.x). → Ubuntu 24.04.2 LTS
:prohibited: Tell us if the issue stops you from using Cursor. —> Cursor is unusable