Frad the plugin requires changes to work on beta 13 because of the things that were deprecated in beta 12 and removed in beta 13. If it didn't have that constraint you would have experienced 500 errors after the update.
I'll try to take care of the update later today.
Frad How can I upgrade Composer to v2 and is it worth it?
Composer v2 should work, but we've had some reports of errors, hence the warning in the update documentation:
askvortsov Warning: Composer 2 may cause issues during install/update, if you experience issues please open a new discussion under the support tag.