Sorry for the late reply, but yes this was resolved. Thank you!

*UPDATE* - I can ping the master server using the location in the logs. (I can't link the actual location because these forums keep telling me it's spam.

I've been playing Pandora actively with friends for some time now, and have never had an issue. However, this morning I wanted to continue playing a saved game with a friend, but the Steam application wouldn't allow either of us to invite or join the others' game. The option was grayed out as if the...