Easy fix, few min. fix, it's the hour it takes to get to it...remove the wall in your storage compartment to access your pipe fittings. Chances are the shut off valve is in the off position. While you are there, using a second person check every water and wash out system you have. My son bought a 5th wheel last year (different brand), we didn't so much as put that wall back on when the dog wash fitting leaked. Not sure why his girlfriend was washing her dog in a Hurricane...
I never used my outdoor shower but when I got into a leak, my shutoff was in the off position from the factory.
I just wish campers had a better access than removing the flimsy back walls.