Outlet Issue

[txhood]

Went out this afternoon to run the genny. After cranking it, I plugged an electric heater into an outlet to make it work harder. Nothing. Got out my meter and the outlet was dead. Checked the other outlets and they are also dead. Only working outlets are the gfci in bathroom and the inverter outlet for the tv. Checked the breakers at the box on the side of the bed, even flipped them on and off. Still no juice. After exercising the genny I plugged back into shore power and outlets were still dead. Is there another breaker box somewhere? Any other ideas on where to begin to trouble shoot this would be appreciated. 2017 26xd

[WinnieView]

There may be another gfci in an outdoor storage cabinet.