Yes I had it before, but of a slightly different nature.
If the error still persists for you, before you talk to Aran Linvail, use CLUAConsole:MoveToArea("AR0042") on any of your party members except Player1, Kova and Kiyone. It should work fine from there.
@zyraen
sorry I forgot to reply :/
It worked with that MoveArea cheat, thanks a lot. I finally finished the game now, but there are still some bugs with the wedding, if you still care

I often reloaded because sometimes during the revival-banter Kiyone's "eventually" (when he asks to marry her and she says she first has to ask him something) didn't come to an end

But after a few times of reloading it worked out. The real problem came after the wedding, when I had the choice if I wanted to look what they were doing after the ceremony. No matter what I did, I either was in the ceremonial room with my party and Demin, nobody said anything if I tried to talk to them and I had no possibility to get to the stoneheads (
TOB). Another time I was in a room with Kiyone and Kova, but they seemed to be clones because when I clicked on Kova the map switched to another house in Suldanessalar where he was alone with Kiyone. And even more, there were another Kiyone and Kova with the rest of my party in Rilifanes temple

So eventually I had to load my save-game manually into
TOB, because Ellesime couldn't send me to the stoneheads like she uses to usually.
but still, thanks for a interesting mod, I enjoyed playing it