OBS Studio Virtual Camera and Iriun seem to be in Conflict

I am running Ubuntu 20.04 LTS Desktop. I have installed OBS Studio and Iriun. Both work fine as long as I don't try to use the Virtual Camera from OBS. When I do, the Iriun screen turns a pixalated green color and flickers to my iphone then back to the pixalated screen again. If I turn off Virtual Camera all is fine. It seems there are two apps trying to use the same V4l2loopback device and this may be causing a conflict. I would like to solve this problem so I can use Iriun and OBS with Zoom and Teams. Thanks