I cant go to the island with tao the dialog option never comes up after the update for me. I have a save where i can ask him but that dosent work cause you can only go beetween 6 and 12 and cant ask him after that. Im on android if that helps.
Try to go to leave the underground from the island cave, after the text tells you you need a guide retry to speak with Tao
Thanks it worked.
You're welcome!