Mmhmm, well, I completed Breaking the Siege of Kvatch, and now I have to find Martin to advance Find the Heir. However, the Find the Heir quest makes my Quest Marker point to Savlian Matius, and all he says is "Kvatch was rebuilt from ruins"blahblahblahblah. There's not even any dialogue choices. I tried leaving him alone for a few Days, did some Arena battles, etc. etc., but he's still the same. DISREGARD THAT, I FOUND HIM IN THE ENCAMPMENT, I'M BLIND OLOL

When you go into the chapel does the quest way point marker turn green or red or it might be that you need to follow Savlian Matius to the castle beyond the chapel

I finished the Battle for Castle Kvatch and the Breaking the Siege of Kvatch quests, so Savlian was waiting at Castle Kvatch.
Turns out, I'm so fricking oblivious that I didn't see Martin at the encampment. Ahahahaimsodumlolol.