So myself and my friend are trying to play the new 1.9 patch. Every time we launch a new MP game it crashes for him, but not for me. Both of us can launch single player games just fine, and we've tried both a premade map and a randomly generated medium (Whatever is for 6 players) and both cause him to crash.
We've tried clearing the ship designs and validate game data for both myself and him, and this has had no effect. Not finding a lot of troubleshooting information for this particular type of crash.
I'm currently having him try uninstalling/reinstalling the entire game but beyond that not really much to go on, any ideas?
Edit: I have the mercenaries, map pack, precursor worlds & ship parts launch pack DLC. He has no DLC's except maybe the ship parts launch.
Edit #2 - Reinstalling did nothing for him, my install is fresh since the 1.9 patch as well.