Hi @DeeLewis ...
This is a question that you should probably address with your school's district administration (the folks that are Canvas administrators). Since Nearpod is a third-party application, Canvas (Instructure) wouldn't typically be able to provide tons of support for Nearpod because it's not their product. Usually, to get tech support for third-party applications like Nearpod, you'd need to go back to the makers of that product. If you talk with your Canvas admin staff, they could probably do some research on their end to see if they can do any troubleshooting to get this working again for you (and most likely others also using it at your school). Nearpod does have a Help Center space on their website, and you can find that located at: Nearpod: Student Engagement Platform (zendesk.com). You might want to share this link with your Canvas admin staff as a starting point. Hopefully you will be able to get all of this sorted out soon. Good luck to all of you!