Hi @Susan
Welcome to Q&A forum ~
Could you please tell us the format of this Excel file?
It is recommended to change the Excel file format for a test, such as .xlsx, .xls.
You can also test other Excel files to check this issue.
Before the issue occurred, have you done any changes?
For example, install a 3rd-party add-in. You can temporarily disable the add-ins via going to Tools and Add-ins.
Besides, according to the link "Release history for Office for Mac", currently, 16.65 (22091101) is the latest.
I suggest you update Office for Mac to the latest version.
Any updates, welcome to post back.
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