Zolin Zelin bug with end game quest

I killed the boss Zolina Zelina, after which Dorian appeared with whom I talked and continued the quest, but he disappeared, then Zelina faced 1hp and it was impossible to kill her, after which I tried to go through again, killing them the quest did not continue.. I also can't access the maps even though everything is completed... help with this bug) i play on HCSSF :(