It happened twice now. Load the game (admin password: see spoiler), log in as the Vikings and launch the space ship.
If anyone else encounters this problem: the game of the 'launching' player will not crash, but simply lose connection. So (s)he can then save the game and send that savegame to the host. When the host loads that savegame the game continues with the space ship launched. Make sure not to launch at the beginning of the turn, but after you've been through the city building phase.
If anyone else encounters this problem: the game of the 'launching' player will not crash, but simply lose connection. So (s)he can then save the game and send that savegame to the host. When the host loads that savegame the game continues with the space ship launched. Make sure not to launch at the beginning of the turn, but after you've been through the city building phase.
Spoiler :
vr6006