In a game i'm making/testing this seems to happen more often than is reasonable. It happens always at the end of a game, after a game is over, the world is rebooted, just cuz its easier than resetting everything manually. Sometimes this works fine, other times, everyone but the host gets this error message and falls out of the game. Is this because Im rebooting? if so why does it sometimes work just fine? (I apologize if this is a newb question, but I didnt think it was)
This commonly happens if someone tries to join in the middle of a reboot when the game isn't actually running. Another thing that causes it is the host's clock being more than 24 hours wrong.