This is still an issue for Rebel's Rest (Coalition mission 4). Commander doesn't spawn and mission doesn't do anything, all the other campaigns start fine.

@NoRest4TheWicked This didn't work for me
I also tried removing the apostrophe in the name and editing all the files from "FAF_Coop_Operation_Rebel\'s_Rest" to "FAF_Coop_Operation_Rebels_Rest", but still doesn't work