[MidMOTraveler]

It could be the unit is not properly installed.
There are cases where the supply and return do not line up with holes in the roof.
Unit has to be reset, properly sealing all penetrations.
Replace 14x14 gasket.
Check all the threads on here about leaking AC. There is one that has a Heartland Dometic Service bulliten attachment..
PS welcome to the forum it’s a great source of information.