Grader Error: Grader feedback not found (Cats vs Dogs submission)

Getting a strange error, my submission is not working and there’s a problem with feedback.

I tried clearing the runtimes and starting over as well as renaming the file. Still getting this error.

Welcome any troubleshooting tips. my file and output did seem to work.

This is a technical problem with Coursera. It’s been reported to course staff.

Thanks- resubmitted today and it worked!