I try to go on a server or world and a window pops up and says there is a problem and takes me back to the launcher. I think in profile editing it caused from JMV arguements changing 1G to another number. I set t back but same thing.

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
get on the server/wrld and play.

What actually happened was...:
Describe what happened here
a window popped up and it said there was a problem getting on.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...In JMV arguments in editing profile change Xmx1G and change one to a wrong number. Maybe.
3. ...Get on a world/server and see.