Until the day happens that I get LKali, sometimes Sakuya will just fail me without anything I can do. Does that mean Kirin isn't a good lead? Nah.
Try again another time. Take a break. Let that 99 stamina refill and jump in the dungeon again after a dinner or something.
You can load up on backup plans. Izanami, Susano, Sun Quan, Chester, Neptune. Keep trekking and hope you don't have to use them, but be glad you packed them when you do.