Last Month the Japanese try to retrive this mod a little bit more. They played in the at 2pm CET. At the moment the gametracker,com Server Monitorring is off. Hope soon they turn it on. The ranking seems to work.
Most likely there's a bad egg. Theres an extra folder that shouldn't be in the mod, there's a map that is packed wrong, I recommend making sure that everything is installed right. the new maps that you downloaded could be conflicting. Move them to a folder on your desktop and see if you still crash.
I just tested to see if it were the maps in the latest interstate map pack, I have no problem playing other mods offline and online.