Cubase 12 pro - Metronome stopped working (newbie needs help)

I have the same problem. I’m using the Cubase 13 trial, and using a Motu M2. My problem is that when I use the audio output for monitoring the metronome, I lose the configuration in the Control Room to listen the preview of the audio processing, and viceversa, when I setup the CR I lost the metronome. The outputs become red in the output configuration.

Do you know if I should be able to share the same output for the CR and the main stereo output?

The M2 only has one stereo output.

Thanks