Can't Share Screen of iMac M1 running Monterrey from MacMini Running Catalina
I've just put up a new iMac 24" M1 running Monterrey, migrating from an older iMac (2012) running Mojave. Everything works fine so far, except for screen sharing.
I'm using a 2012 MacMini running Catalina as a Screen Sharing client. I can connect and log in to the iMac just fine. The problem is the screen sharing window on the client is black - I see nothing of what's on the iMac's screen. I can see the mouse pointer moving, but that's all; the rest of the screen sharing window is black.
I've tried everything I can think of and haven't been able to move the ball on this. As nearly as I can tell, I've got everything configured correctly, and had no problems with screen sharing before moving to the new iMac M1 / Monterrey. So far, I've been unsuccessful in finding anything in the forums that addresses this particular issue. Any help is much appreciated!
iMac Line (2012 and Later)