On ours there is a screw on the latch that sometimes come loose, when that happens I just pull with the key until I can turn it. Tighten up the screw, but if I over tighten I'm unable to lock the door.
2011 Cameo 34SB3
2014 Ford 350 King Ranch, Trailer Saver BD3 Air Hitch, Mor/Ryde pin box, IS Suspension, Disk Brakes
Nights Camped in 2012 - 142
Nights Camped in 2013 - 186
Nights Camped in 2014 - 185
Nights Camped in 2015 - 231
Nights Camped in 2016 - 162