No version (1.12 to the 1st ever release) is working.

Only 1.13 is working, but Mineplex (the server I want to play on) has not yet updated to allow it. The message says "An unexpected issue occurred and the game has crashed. We're sorry for the inconvenience." I'm unsure as to what I need to do to get it twork.

What I expected to happen was...: 

Minecraft opening up and allowing me to pick Multiplayer, Single player etc.

What actually happened was...:

Instead, the crashed error came up.

Steps to Reproduce:
1. Put any update that isn't 1.13 on

2. Press 'Play'