@TVHawk
Taken from here:
https://helpforum.sky.com/t5/Sky-TV/Error-Codes-on-Sky-Q-and-Glass/ba-p/4017045
Multi room q box showing error MR104 means your mini box might be a bit too far from the main box to get a reliable signal from it.
Try going to Settings, then Setup - Network - Reset, and at step 2 of 4 on screen, press the WPS button on the front of the main box.
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