Crashing just before joining some servers

So this has never happened before out of my 2053 hours of Gmod but on some servers, not all, when I’m at sending client info my game crashes and I get this error message: http://i.imgur.com/NLzb8lq.png

I’ve tried uninstalling addons and verifying game cache. Nothing has worked yet.

I’ve had this issue for a real long time. I’ve updated my graphics card drivers and installed Ley’s Gmod 9-10 Module for 13. I haven’t had an issue since