cannot join worlds others cannot join my world. can't delete my worlds.

Put the summary of the bug you're having here
I cannot join other peoples worlds. Others cannot join my world. I cannot delete any of my worlds. I lost everything I built but the world is still their.
What I expected to happen was...:
Describe what you thought should happen here
I should be able to get my worlds back. I want to join others and want others to join me.

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...