The End would not load causing the world to be unplayable

After my friends and I defeated the Ender Dragon, the server stopped letting any player in the End. The world would stay in a constant state of "Generating World". After I closed and reopened the game, the server wouldn't allow any access in general. I believe players in the same wifi as the server is able to connect to it but once you access the End, it's just a constant death trap.