after a long while, i returned to doc last weekend. it's amazing what has happened here!
anyhow, i'm writing here now because i encountered the very same problem as omnislip just reported - in my case with the french at a 600 AD and the japanese at a 3000 BC start. everything seems to work just fine, however... if it wasn't for this endless stream of event handler error messages.
I can provide you with saves and screenshots tomorrow, if needed, have to go to bed now.
But let me say once again how excellent this mod is. It really catches me completely, forgetting everything around me. Thank you!