Thanks Kiji! Part of this is how Moren's test really works: the Intermediate Monster Crystal has to be one you craft with Maker AFTER he gives you the test, not one you bought or made before. But two things were broken: he went quiet instead of telling you that, and tests accepted a while ago could never pass at all. Now he tells you plainly, and older tests count too. Craft a fresh crystal and bring it to him. This is LIVE now: refresh the game to pick it up.

Update***: I made the crystal after the quest was taken and he still won't take it.

Thanks for sticking with this, Kiji! We dug into it: every Intermediate Monster Crystal you brought Moren was broken out of old equipment with Maker, and Moren is a stickler. For his test the crystal has to be made from 100 monster leftovers while the test is active. He used to refuse without saying why; now he tells you exactly that. Gather 100 monster leftovers of the right kind, turn them into an Intermediate Monster Crystal with your Maker skill, and he'll sign your test off. This is LIVE now: refresh the game to pick it up.