Hi Patricia, we've had this as well here in Sweden on Feb. 22, 2024. We haven't found anything that explains it, but as I was searching here, I think it's linked to the "rate limit exceeded" thread. I took a screenshot of the top of the thread and added the link here...
https://community.canvaslms.com/t5/Canvas-Question-Forum/What-does-quot-rate-limit-exceeded/m-p/2144...
I also have the screenshot of the message one of the teachers received here, as well as the error notice, in Swedish.
It is odd... and I do think it's just an error that resolves itself, as we've not seen it again since, so we've closed the case for now.
... hope this helped. ~Teri
Swedish - Grader limit...