Since you mention maiden voyage, I would suspect that the coach is wired that way and you don't have an problem but checking the inverter for a tripped breaker is a good first step. Many coaches are wired such that only the "most necessary" plugs are live when using the inverter. That would be convection/microwave, TV, kitchen outlet(s) and maybe one side of the coach wall plugs but not both.
I don't see the year or model of your coach listed in your post but that information might get you a direct answer from another owner.