minecraft makes me play offline even though im conected to the internet and then when i open a world it crashes

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
it should have opened the world

What actually happened was...:
Describe what happened here
it took me to a crash page

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. open minecraft
3click play offline
4 open a world
5 watch it crash
3. ...