I know that many people say that KLJP is not compatible with BeamMP, but i have seen some servers use it with no issue. I have tried renaming the files so the core mods loads first. But it says that the core mods are disabled for some reason. I tried searching it up, but i couldnt find anything.
KLJP is known to not work with BeamMP. I dont know what the other hosters have done, but my best guess is, that they have edited the mod. Maybe its a good idea to talk to them?