"suddenly" losing function sounds like a power issue.
Would be helpful to know make/model/style of outside fridge. Even understanding what TT you have could help, as well (ie. "
2020 forest river flagstaff" points to one year (2020) and one brand (Flagstaff) under the Forest River umbrella).
I have a Rockwood Roo 235S (with an outdoor fridge) that is identical to the Flagstaff Shamrock 235S. The outdoor fridge is a 110v dorm-style fridge that is actually plugged in to an outlet/small power strip behind the fridge itself. Some owners have stated their outdoor fridges have not functioned, only to find that the plug was not plugged in.
In the case of a 110v fridge (and if your fridge/setup is like mine), I'd look on that side of things first (that would be: inverter/shore power, the circuit breakers (not the fuses), the GCFI outlet (likely in the bathroom), the outlet/power strip behind the fridge, etc).
Hope this helps.