me8ismenos

hey guys..i have the problem with the fight button dissapearence..it disappears ath the 3rd battle..the problem is that i'm now on dragon spiral tower where i have to fight 4 plasma grunts one after the other(spoiler) and i cant because of this..i fight the first 2 and on the 3rd one no matter what i tryied the fight button disappears..so does anyone know how to fix that..?