TL;DR: If you’re using MixEffect Pro, do not update to the iOS 16 Beta until I give the go-ahead. It won’t work! I’ll be investigating the root cause of this, and I hope to have an update out soon!
I get my hands on a brand-new M1 iPad Pro, upgrade it to iOS 16 Beta, configure it for use with my developer account, install MixEffect Pro, and watch it crash!