Plug-in not appearing in AU Instruments

For some reason, I can't see the UVI Workstation AU plugin when I load Logic Pro.

The VST works fine in Cubase 11, but not the AU. Logic clearly lists it in it's plugins and it verifies correctly, I've checked the folder location where the AU sits and it's definitely in there.

I've tried reinstalling the plugin and Logic Pro. I've tried removing the AU Cache and letting it rescan. Nothing seems to work, and I still cannot see the plugin when selecting AU instruments in Logic.

When I load a previous project where I have used the plugin, it says it's not available. I have previously been running Logic in Native mode for M1 Silicon and the plugin worked perfectly, but I've also switched to Rosetta 2 and it still doesn't show in the list of AU Instruments - the UVI sub category doesn't even show. All of my other plugins are working as expected.

I have a project I'm working on which makes heavy use of the Orchestral Library and I can't continue it at the moment because I can't load the sounds :( Any help you can provide to resolve this would be greatly appreciated.