Bug: mulitplayer game error when playing

Ferdinand observed errror while trying to play mulitplayer in the meeting
joining games and hosting games did not work, for both VS and Story
single player worked.

Error occured while starting a game, on the loading screen.
error did not happen instant after startup, but a couple of seconds after startup.

Start by reproducing the error on the loading screen while joining and hosting multiplayer games in both VS and Story modes, noting what happens after the delay of a few seconds. Done means both multiplayer modes start successfully while single-player behavior remains working.

Written by the indexing model from the issue text.