I'n my latest PT, two ACT 1 quests are blocked, because I can't talk to Zevlor : Save Halsin and Save the Refugees. Despite the fact I'm on a path I did several times already without problems. The only difference now, is that I'm running a Gale origin PC instead of a custom Tav.
Synopsis :
I went to the goblin camp, rescued Halsin from the worg pens and told him to stay there and let me handle the goblin bosses.
Then I talked to Minthara, revealed the grove location and agreed to open the gate when her army arrives.
Did a long rest and waited for Minthara's army, whom I betrayed.
Defeated the goblins and knocked Minthara out.
So far, everything is the same as my previous PT's.
Normally, after the battle Halsin would enter the grove, and I 'd have a word with Zevlor.
Now, no Halsin comes in. All the Tieflings stand at the ready to leave. Everyone thanks me for saving them. But when I want to talk to Zevlor, he can only respond with "later" or "not now".
On the map, the marker for the 2 quests remains visible, with the instruction to "talk to Zevlor" for both, but Zevlor doesn't want to talk to me.
I went back to the goblin camp. Defeated Gut and Razglin, but nowhere was Halsin to be found . Not alive nor dead.
Went back to the grove, all the Tieflings are still waiting to embark, but Zevlor still doesn't want to talk.
I go to the inner grove. The ritual has ended. Karga says Halsin ended the ritual. Rath thanks me for saving the grove, but wonders where Halsin might be. Nettie thanks me also but doesn't mention Halsin.
Doing a long rest. A normal one, not the Tiefling feast. When I return, tieflings are still waiting at the exit. Dammon, in his forge, thanks me also for the victory. Zevlor still refusing to talk and the quest marker staying active.
End of synopsis.
So , now I don't feel very motivated to continue this PT. If the tieflings, including Dammon, don't move out. And if Halsin is not there, Act 2 will be like a Durge act with all the disadvantages and none of the advantages of the Durge.
I can't say what caused this. I have mods, but have run this scenario successfully with the same mods. The only difference, as said before, is using the Gale origin.