I tried removing some plugins specially the selfhelp, I'm sorry to the creator I don't mean to offend maybe it's my setting that has a fault. But reducing the number of plugins I have helps not to crash. Also, just to add, my game also crashes when applying custom infected skins. I wanted to try to install the custom skins with limited plugins but after reading somewhere that error appears to other people if they try to join local server with custom skin, I'm having a second thought about it.