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.