I try to make a new world but it crashed every time i tried to play on it

Put the summary of the bug you're having here

*What I expected to happen was: Making a new world and playing on it.
Describe what you thought should happen here: I should've got on the world and be able to build watever i wanted

*What actually happened was; Minecraft crashed
Describe what happened here: It was stuck on the Building terrain but then it crashed

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
I don't In fact know how to trigger this bug but I tried to use a moded client and the worlds woundnt works so I swiched back but the same thing happend. Thank you for listinging Mojang team.