I just finished the Dark Castle Area and got the gem but because I never approached the Castle Gates the quest did not continue. When I tried to progress I got stuck on looking for another way in. Went in multiple different ways and it still does not work. So now it seems I can not finish this quest.
Is there any way to fix this without doing it over? My last hard save before the Castle is 10 hours ago. I saw a few other posts about this but it was never addressed with a solution or bug fix.