We were only able to reproduce this message in an isolated scenario. We uninstalled Office by dragging the application to the trash, and reinstalled without deleting the existing license information.
First, uninstall Acrolinx for Mac.
Then, follow the Microsoft instructions to Troubleshoot Office 2016 for Mac issues by completely uninstalling before you reinstall to uninstall Microsoft Office.
After following the Microsoft guide above, reinstall Office 2016 from your Microsoft 365 account, enter the required licensing details, reinstall Acrolinx and restart your machine.
You should be able to run Acrolinx successfully again and avoid the VBA message.