Hi,
There could be compatibility issues or specific requirements for certain add-ons that are designed for business or enterprise versions.
Here are a few things you can try-
- Verify that the add-on you downloaded is compatible with your version of Excel. Some add-ons may have specific requirements or limitations that are not compatible with Microsoft 365 Personal.
- Clear the cache and reinstall the add-on. Uninstall the add-on from your computer, clear any temporary files or cache related to the add-on, and then reinstall it.
Best Regards.