The rooting attempt most likely damaged or corrupted something in the firmware. It has to be re-flashed. You might try a factory reset, but I don't think that will clear it. To re-flash the firmware, it's download it from Huawei's website and flash using recovery.
FYI we don't usually recommend these supposed "one click root" tools on AF, such as Kingo, and are very definitely.....USE AT YOUR OWN RISK!