World keep crashing when I open it

When I open my world on McPE it shows that I am in bed and when I press “leave bed” the game just crashes. There is an option “open chat” and when I press it I can’t do anything. If I don’t do anything the game still crashes after 3 or 4 seconds. When I make a copy of the world where I have the problem(it’s the only world I have) it still doesn’t work but if I create new it works with no problem.