Hi, @Shannon Parker
I would like to know more information so that I can better help you solve the problem.
Please provide a screenshot of the error reported by OneNote.
Did you make any changes before the problem occurred? For example, have you installed third-party software or updated Office or MacOS?
What is the version number of MacOS and the version number of Office?
You can try uninstalling and reinstalling Office first.
If the response is helpful, please click "Accept Answer" and upvote it.
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