GarageBand crashing on late 2012 iMac running Sequoia; help??

I FINALLY figured out how to install Sequoia on a late 2012 iMac using OpenCore. I downloaded GarageBand from the App Store (literally the whole reason I’ve been doing this).

The app opens up, lets me create a new project, and lets me create a drummer track. But if I try to create a MIDI, instrument, or audio track, it instantly crashes!

When I try to create an audio (microphone) or MIDI track, it throws me a 0x68 error. When I try to create an instrument (guitar or bass) track, it throws me a 0xa8 error. It never actually creates the track. Just click “create” and it crashes.

I’ve uninstalled and re-installed the app. I’ve run the “codesign” command. I’ve tried reinstalling the sound library. I’ve run the OpenCore post-install root patches and rebooted. I’ve disconnected my external audio interfaces. Google has been no help. Is there a solution???