It was happening on both my 5D and my one DX. This is before even connecting any camera for me. It was a software issue and by creating another user, the software loaded as expected that is how I solve my problem.
I just plugged it into my 1DX Mk II. I turned on Liveview on the camera, then on the remote window, I clicked on Liveview and it came right up on my screen. So it works just fine. In my previous solution, the problem is surely a conflict with univ...
What worked for me was to create a new user in the user and groups section of system settings. Give the new user admin rights and reboot. Log in as the new user (if you don't get the choice once you computer is fully booted, log out and log back in...