I can’t listen the files from mediabay and the right zone of the arranger project.
If you are using Control Room, make sure Monitor 1 bus is added. All Previews are routed to the Monitor 1 bus.
If you are not using Control Room, make sure one of your bus in is set as Main Mix in the Audio Connections > Outputs.
My control room was active and that was the problem. Thank you so much