I have a quest from Altinova where you have to build a boat for a guy named Nyabee and then he gives you a raft to go out to an island and buy him some kind of mushroom seedling. I did that, I got the seedling and got it all the way back to Altinova. I went up to the guy and he won't accept the quest. In the quest info, the part about buying the seedling is still white and not crossed off. Why? Is this quest broke? Did I do something wrong? Was I supposed to sail my raft back to Altinova? Velia was closer so I went there and took my horse back to Altinova instead.

Dont even have to sail there from altinova.

You bought the trade item, then moved it on to horse moved it to alti and sold it to the guy who wanted it?

I figured it out after I posted, I didn't realize you actually had to sell it to the guy.. I thought you just needed to talk to him and he'd take it off your hands like similar quests in other games. Now my raft is parked on the beach in velia with 0 stamina left

To finish that line quest You must have conect that comercial node to velia, then sail to the island and buy the iten You need, after that you must return with the item to the npc in altinova

PD: sorry for the redaction, english is no't My lenguage