Hello @Mark Veta
you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. It sounds like this started today. If you haven't already I would recommend taking a look at the article down below.
We can also attempt in a test file to see if we experience a similar issue. I'll leave instructions down below.
You'll find it on the third step down below. This will give us a better idea if it's a file problem or a Connection problem. Once you get the chance let us know how it goes!