Big Sur, click Chroma Key, then ManyCam crashes

I updated my Mac to Big Sur (11.1) and when running Manycam, I enable Virtual Background and then click “chroma key” the app immediately crashes… every time. I have uninstalled and reinstalled and reactivated Manycam multiple times with no success. I am currently running Manycam but I think I also tried the beta 8.0.5. I am using my iPhone (iOS 14.3) and the Shoot app (2.0). I also tried EpocCam but that also crashes Manycam. How can I help get this resolved?

Please send us the crash report:
Thanks in advance.