There have been a number of recent threads on this - try searching through the forums. E.g. A recent Mac OS upgrade (Mograve? Mojave? Not a mac user!) changed the security model so you need to grant Adobe access to the camera in the security section. This fixed the issue for a number of people (and would explain why going back to the old version of CH did not help).
Another mentioned problems with audio I think - something do with with setting the sample rate to 48khz to be the same as CH.