Not Bug A bug about The Legend of Snail

As the picture has shown, after I beat Mano and bring its Rainbow Snail Shell back the NPC, after I talked to her but the quest didn't complete and shown error, any solutions?

 

Try changing channel.

 

Nope, doesn't work

 

Will get @Andreas to check in with you.

 

Okay thanks bro

 

This is a known broken quest.

You can find a list of broken quests and unobtainable quests here (The quote above is from that guide!) if you're on track to-do a bunch of em. You can also check here to see reported broken quests/report any new ones if you find them.

 

So as the thread shown that Legend of Snail are basically cannot be done, so there's no other way to complete the quest?

 

Correct, you can't complete the quest until we fix it!