[GAMEPLAY] Unable to Cast Gragas Q

I used my barrel to waveclear near the purple side toplane inner turret but it didn't show up on the screen, and after that I was unable to cast it for the rest of the game. -Clicking on the spell to cast rather than pressing a hotkey would not bring up any range indicator or anything. -The tooltip showed 0 mana and 0 cooldown when hovered over. -I reconnected to the game and later restarted the client but neither fix solved the issue. -Occasionally I would hear the sound effect of the barrel exploding when I was in combat, but still would not be able to cast the barrel.