Hi there!
Sorry to hear this is happening! Are you still seeing this error message?
If so, I’d recommend you to reach out directly to the support team with a copy of your file by filling this form: here
Our technical specialist can have a deeper look at it.
Be sure to use your Figma account email, include a link to the file, and share it with support-share@figma.com so they can take a closer look. Thank you!