Please help me

[cam123911]

Okay, I've been trying to host/join servers for awhile and I keep getting the same error. I've uninstalled/reinstalled three times now. Nothing is working! I seek answers.

 

 

 

 

 

Picture of error code

http://prntscr.com/2x5kan

[fufnulius]

Have you tried to reset the pack?

And maybe it's a hamachi server.

[cam123911]

I have, I have no clue why its so screwed up. Like one day it was working fine, next boom not working at all.