Hello!
Do you use custom made mods? If yes, which? Does all peers have that mod downloaded from same source? Does all peers have same version of the mod?
Are all 4 of you using steam or gog? Do you using "direct connect" option? Do people join one by one or all simultaneously? If all simultaneously - i think you should try to join one by one. There was report of problem on that front.
Have players submitted error report via tool upon crash?
And as final - is everyone have a same version?
Last edited by Seter; 13/10/17 11:21 AM.