Do not remember exactly where, but the Maegoo does not have access to the Abyss Talent yet. The Abyss Talent is a quest per char, the storage is done once as family quest.
Thanks for answering me.
Searching a little more on the internet, this is also what I thought I understood.
On my xbox, I have other classes level 56 and 57. I will do the quest with one of them.
On the other hand, on my ps5, I have it with my maegu, level 61. Of course, it didn't work, so I'll try with another class.
Hoping I could do the quest again.