A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
Dear jank97,
Thanks for posting in Microsoft community. We are glad to help you.
May I know if the issue happened with all notebooks in your OneNote? Please try to sign in OneNote for web version and see if you could repro the same issue there.
If no, please follow this article to uninstall OneNote and reinstall the application to see if this could help you with the problem.
1.Uninstall Office for Mac - Microsoft Support
2.Download and install or reinstall Microsoft 365 or Office 2021 on a PC or Mac - Microsoft Support
Thanks for your understanding and cooperation! Hope you keep safe and healthy always.
Sincerely,
Sean | Microsoft Community Moderator