Dear caseysususco,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
Based on your description, we understand that the third-party plugin you use doesn't seem to work in Excel.
First of all, I did not search for this plugin in the official plugin store, so we cannot rule out whether there is an incompatibility between the plugin itself and Excel:
For such a phenomenon, I would also like to know the following information:
- If you create a new workbook, will you still not be able to run this add-in?
- Could your classmates use this add-in normally?
- The version information of Excel you are using (File - Account - version information)
We look forward to your reply. Thanks for your cooperation.
Sincerely,
Tin | Microsoft Community Moderator