I've just released Mp3tag for Mac v1.8.11 with the following changes:
Changed, Improved & Fixed
- Check for minimum required version of Mp3tag for a Tag Source did not compare all version segments numerically, which resulted in misleading error messages since the last version. (#62902)
It's a free update! You can update the Mac App Store version via the Update tab in the App Store app and the standalone version from within the app via File → Check for Updates .