Hyper-V VMs

I manage a Hyper-V server from a laptop. I connect to the remote laptop with ConnectWise Control, then open Hyper-V, but any VM I connect to has either a completely black or grey screen. I know the Hyper-V host is working and the VMs are running without issue, and that the VMs can be viewed directly on the laptop, but I just get a blank screen on my end.

I used this extensively to setup a few VMs with version 6.4, but now that I'm on 6.6.17081.6648 it's not working. Any suggestions? I need this to work again, otherwise I'm going to have to drive 1.5 hours just to get to the server.