VCam Won't Work With Zoom

VCam has stopped working with Zoom, as have my other virtual cameras. VCam displays video, Zoom won’t. When I try to change cameras in Zoom’s video settings, the settings window freezes and eventually crashes. I have tried uninstalling and reinstalling Zoom, VCam and the camera (and the other virtual cameras) and have updated all drivers. Nothing works.

Camera is Logitech c922. VCam is 2.2.2013.2502. Zoom is latest as of 4.21.2021.

Any ideas how to fix this?