Minecraft Keeps Crashing!!!

Put the summary of the bug you're having here

*What I expected to happen was.that i would get into the nexus server or whatever server i wanted to get on then i could play the game.
Describe what you thought should happen here

*What actually happened was that when it was loading to enter the server, the screen went black then it crashed!
Describe what happened here

Steps to Reproduce:
1. add the "Nexus" server with the address "hub.thenexusmc.com"
2. Then click join server
3. Wait while it loads then minecraft should crash