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 7.7.1.2 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?

@challah
Please send us the crash report: https://help.manycam.com/knowledge-base/macos-crash/#report-the-crash-to-our-support-team
Thanks in advance.