EvideoIn Black Screen

Hi - im trying to get evideoin working - but am just getting a black screen. It’s seeing my camera/s the plugins dropdown menu. But no video is showing.
It wokred fine yesterday , using a iphoe SE.
Running on MacOS Catalina 10.15.7 - Any suggestions to get it working?

Hi Jack,
Does the camera show up in QuickTime Player and do you see its output when you select New Movie Recording?