After completing both questlines, farming scorching sun shards, heating for scorching sun crystal, I am unable to get the conversion quest from Merindora in Grana. I believe the mistake that allowed this to happen was the Black Spirit gave me the quest line without unequipping my BS weapon. Now that both questlines are completed when I return to Merindora with the materials necessary I don't have the repeatable [Godr-Ayed Weapon] In the Fallen God's Name:

Anyone else struggling with this? I have posted a Support Ticket but that could be days.

I know that I had to mess around with the quest before it finally gave me the right options. It will only give a quest for a weapon that your character has currently equipped, so first and foremost you can only do the quest with the character that uses the weapon you want to exchange since every step of it requires that your character have the weapon equipped.

Second, if you have more than one blackstar equipped then you have to make sure you take the quest appropriate to the weapon you are wanting to exchange.

Once you have the weapon equipped then it should give the correct quest, hopefully. If none of that applies or helps then I hope your ticket has already been addressed at least!