ok for some reason everytime I play with or against Soviet/Yuri it always gives me a internal at the beggining of the game, its gay I dont get it, it looks like it happens when the MCV is deployed by either Sovietor Yuri comps.
You made some new Yuri or Soviet Units with AllowedTostartInMultiplayer=yes or Not the tag AllowedTostartInMultiplayer=no. Coz if these units have an bug they will crash up the complete game