Hey people I realy hope this video will help you ! If not you are welcome to leave your coments and I will see if I can help you !
Just One More time want you remind.....
1.Check do you have your device rooted and rooted correctly is there SuperSu or SuperUser on your home screen !
2.Download root checker and see what it says !
3.Open your SuperSu or SuperUser and check have GameKiller accsess granted !
4.And last - Hold down OFF + volume down buttons to open bootloader then navigate with volume buttons and select with on/off button - in bootloader menu select fastboot then reboot and wait until your device reboot after that try to open your SuperSu to check is it working properly !