Packu

(Im sorry for my bad english) Hi, Me and my friends tryed to create an Server in the 1.12.2, we added some mods to the server and startet it. I can join the server but everytime my friend join the server it says "fatally missing registry entries". Later we noticed that the vanilla doors are bugged on the server. Now I wonder why i can join the server and my friend can't. Please help :c That's the start log startlog.txt And sometimes it says that at my friend (Screenshot)