In a running game Vassal asks me "Join side as wich side"

I was running pbem Paths of Glory module game, and now after some turns Vassal asks me “join as wich side” seeing both the two “good” sides as occupied and offering me only the observer and the solitaire.
What has been happened? Yesterday when i was playing the Pc has crashed so I think some id file has been corrupted and now Vassal does not recognise me as me anymore. What can I do to recover the game?

This means the module password currently in use does not match the module password that was in use when you initially joined your player side in this game. I would try changing your module password, if you can remember what password you might have used.