Hi @ElizabethHesser ...
I've been seeing a handful of users showing similar screens recently here in the Community. Here are the things I'd recommend trying:
- Make sure your browser is up-to-date.
- Try using a different browser such as Mozilla Firefox or Google Chrome.
- Try clearing your browser history/cache:
If none of those options work, try contacting Canvas Support:
How do I contact Canvas Support?
You might also want to reach out to your Online & Distance Education department at the University of Nebraska-Lincoln to see if they have any thoughts on what might be going on. And, you might want to use this Guide:How do I contact Canvas Support? as yet another good option to try.
Hopefully you'll be able to get things working soon! Keep us posted...thanks!