I'm aware of the black quest log on android, but have no solution for it yet.
I'll check if the trigger for the New Blade quest is wrong in the convertion to the new quest log system.
I had restart the game and prepared the materials before accept the New Blade quest, the quest now can be complete. Now another problem come out that I need your help which is Mira's 6th event (first s** scene) unable to trigger even I had completed all conditions to unlock and she only give this reply no matter how I did.