Skip non-existing plugins rather than exit the game
I was testing out a mod and added its data files path location manually in openmw.cfg I turned the plugin on in launcher. After testing, I deleted the folder with the mod and the data path in openmw.cfg. I forgot to uncheck the plugin in the launcher and while starting OpenMW, it crashes saying Failed loading the content file doesn' t exist.
I used OpenMW 0.45.0. In my opinion, it should give the user something like: That and that plugin doesn' t exist and then two options continue or quit. (So the user would still be able to play the game without those plugins)