Trail92

Hey guys, I was walking on a map when a wild Kartana lv. 76 appeared. I had some master balls so I threw one in. All that was displayed was 'You used a Master ball and could not attack.' That's it. Pokemon was not caught and i think I wasted 8 Master balls and 3 Ultra balls before I blasted the jack out of the pokemon. Anyone else faced this issue? It is a kind of bummer as it was my first Ultra beast. Regards Trail92