Talk to Ursula once again ! It should validate the quest.
Viewing post in Ballad of Outstanding Bimbo Sorcery comments
Ah yeah ,sadly it's a bug on the Android version...
Here's a link to the compelte walktrhough, it'll be easier ;)
https://mega.nz/file/TWhBERBC#lreeyEqykN5Q7sLtz4R3MdcepoZnF4e5YqaA5o94fOY