Help!!! I just bricked my tmobile lg h811 trying to root it! Please help me fix it!

SO I JUST TRIED TO ROOT MY DEVICE AND I DID EVERYTHING THAT I WAS SUPPOSED TO DO WITH THE ROOT TUTORIAL PROVIDED BY THE PEOPLE OF XDA DEVELOPERS.

THREAD NAME IS .. [ROOT] TMO/VZW/ATT/SPRINT/INTL Root your LG G4 with Low Effort Root!

MY DEVICE IS HARD BRICKED AND WHEN I TRY TURNING IT ON, A SECURITY ERROR SHOWS UP AND IT SAYS AUTHENTICATION FAIL #11 ..AND I DONT KNOW HOW TO FIX THIS..PLEASE, PLEASE, PLEASEEEE! ANY KIND OF HELP WOULD BE REALLY REALLY APPRECIATE IT. THANKS.