So I've collected 16 star stones and I still am unable to get through the gate at the Source Temple (even though it says you only need 14)

I've also noticed the Imp (Zixzax?) has been missing for quite some time. Along with that my homestead hasn't upgraded past the first Elemental Room and Private Chambers.

Having come all this way to run into this game breaking issue has me pretty pissed off. 60 hours of gameplay to get stuck at the very end...