Black Screen from UltraStudio Min Recorder to MacBook Pro

I just purchased the UltraStudio Mini Recorder and have had NO success sending video from the UltraStudio Mini Recorder (HDMI) to my MacBook Pro 2016 (Catalina). I have tested all cables, and tried connecting a Nikon Z6 camera and a Canon Vixia HF G50 camcorder with NO success.

I am able to select the UtraStudio Mini Recorder device in the Apple Quicktime app and the BM Media Express app. However, I only receive the black screen.

My Set-up:
MacBook Pro 16 (MacOS 10.15.3)
BM Desktop Video 11.5 software install
Apple Thunderbolt Cable w/ Apple Thunderbolt to USB-C Adapter
Nikon Z6 Camera
Canon Vixia HF G50 camcorder

Do you have any troubleshooting advice for me?

Thank you.

This device only supports up to resolution and framerate of 1080i50/60 Both cameras you mention output by default 1080P50/60

Change your OUTPUT Resolution of the camera to 720P or 1080I

Thank you for the response.
I have changed the Nikon Z6 HDMI output resolutions to 1080i and 720p. See image below.
I am still receiving the black screen.