Every time I try to get on my friend Softboundshine's Realm, it instantly crashes my game. Please fix this.

Every time I join my friend Softboundshine's Realm, it kicks me off. I don't know how to get back on.

What I expected to happen was that I would be able to join on perfectly fine.

What actually happened was that it crashed my game on the loading screen and made me have to log in again.

Steps to Reproduce:
1. Get on Minecraft, and click the 'Play Button' on your profile, like normal.
2. Wait for the game to load, and then click the 'Minecraft Realms' button.
3. Click 'Softboundshine's Realm' and wait for it to load.
The screen should become slightly darker and then bring you to a 'Crash Output' file in the place where you click the 'Play Button', causing you to press play and wait for Minecraft to load all over again.