Playing on creative world makes the application randomly close

Recently I copied a world to redo some redstone wiring to my Five Night at Freddy's map I'm currently working on. Every creative world I create or play has these problems.*

I load a copied world and have to keep switching to creative (won't save) and when I hit load the game it says, "Trophies will be disabled because this save belongs to another user." I load the world and after building for not even a minute, the application says, "An error has occurred in the following application (CE-34878-0)"