Fall through world

Playing multiplayer with one other person and as the host I get an a red line error in the F1 list, When this happens we can't interact with anything and my partner keeps falling through the world. Only recently started happening. We have tried closing the game and both restarting but it continues every time within 5 minutes of the game loading in. Error code below

ERR NCSimple_Deserializer (cl=EOS_00022f6bfa244342a72b118fe498387a, ch=0):

EXC Attempted to read past the end of the stream