Can't join a servers because it crashes

Put the summary of the bug you're having here
If I join a server it crashes imidietly.
What I expected to happen was...:
Describe what you thought should happen here
I like to see you help me out.
What actually happened was...:
Describe what happened here
I don't know
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...