Cannot Open a Single World! - Crash

Hello,

I cannot open a single world.

Clicking to join a world:  it briefly loads, then crashes the game.

First I tried joining my Realm and it terminated the game.

Then I tried joining a local creative world and it terminated the game.

Then I tried joining another local survival world and it terminated the game.

It would be nice if you guys could get out an update without extensive bugs!

-Regards.