Randomly crashed on a server

Put the summary of the bug you're having here

What I expected to happen was...:
Normally walking.

What actually happened was...:
I tried to walk and it just crashed.

Steps to Reproduce:
I don't exactly know how it happened. My laptop is decent (able to run at 30 fps+) (yes, this was on my laptop, I was not at my house at the time) and it doesn't usually happen like this.