It sounds like the add-in you're using on your desktop computer may not be supported by the version of Excel you have installed. Some add-ins are only compatible with certain versions of Excel, or may require additional software or components to be installed on your machine.
Here are a few steps you can try to troubleshoot the issue:
- Check the system requirements for the add-in: Visit the website of the add-in's developer and make sure that your version of Excel is listed as a supported platform.
- Check for updates: Make sure that your version of Excel is up-to-date, and that any updates for the add-in are installed.
- Try reinstalling the add-in: Uninstall the add-in from your computer, then reinstall it from the source you originally downloaded it from.
- Contact the add-in developer: If none of the above steps resolve the issue, reach out to the developer of the add-in for support. They may be able to provide additional troubleshooting steps or offer a solution.
I hope this helps!