@polivernz I just had this issue and my monitor does not have an official driver. I just uninstalled the generic monitor driver and did not refresh my device list. Opened C4D and that seems to be working so far. I have yet to restart my PC though so I might have to do it again every time I start c4d.
EDIT: Just restarted my PC and I had to uninstall the generic PnP monitor again for C4D to work. Big Sad.