G920AZ REPAIR DRK help

Platform: Samsung Android
Selected port: COM12
Selected model: SM-G920AZ
Detected phone model: SM-G920A
Firmware compiled date: Tue May 31 19:46:30 KST 2016
PDA version: FA50_G920AUCU4APF1
CSC version: unknown
SW version: unknown
Phone SN: R58G60644VN
Android version: 5.0.2 (LRX22G)
Sales code: unknown
Country: unknown
HW platform: exynos5
HW Chip: exynos7420
HW Modem: unknown
Codename: zeroflteuc
Checking Root:
Phone is Rooted.
Initializing exploit…
Executing exploit…
DRK fixing failed!
Performed by 2.4.5 Software version.

I flashed COMBINATION_ATT_FA50_G920AUCU4APF1_ATT4APF1_CL6591 030_QB9800061_REV02_user_mid_noship.tar.md5 and rooted with KingoRoot