my game crashes when i try to load into the world

[carolina curtis]

not 100% sure if this is the right place to post or not but my game is crashing when i try and load into my world on mystical block

'The game crashed whilst exception in server tick loop Error: java.util.concurrent.CompletionException: java.lang.NullPointerException'

error: -1

[Kim Williams]

The only thing I can think of right now is disabling any shaders if you're using any until you load in, at least that's what I have to do whenever I run into this issue. If that's not it idk how to help I'm a casual