I'm going to guess the condensate drain line is plugged. I've had that happen on cars before and wound up with water on the floor.
Likely an accumulation of dirt/debris in the drain on the unit. I used a wire to ream out the tube on my cars. I imagine you will need to view a diagram of your model to locate the drain (unless it is readily apparent) and clean it either with a wire or compressed air.
Mark & Susan
Former MBS 24R and 2401W Owners
Just recalibrating our camping set-up for now!