I'm working on the Level 96 Healer role quest but keep getting this message every time I try to Esuna this last bather. Anyone know what could be going on?

Tried out Monk for the first time this expac and it feels better now that i don't have to keep a buff and a dot up and making sure i get and spend Leaded Fist.
The mental upkeep became too much the more i played it