Contact Forest River or your Forest River dealer for replacements. Some models of trailers are having issues with some of the low cost LED lights that are being used. I have had some issues with my LED's lights but they are all independently switch and the switches are failing over time and use.
I have chosen to replace them with different LED light fixtures, since all I would receive from Forest River are the same low cost lights for replacements.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67