G960f u4/s4 protection read code failed

hello i`m trying to unlock g960f on u4/s4 PROTECTION but it failed on z3x ..
and i cant find u4 combination any where on the web .

is there a way to unlock it ?

PS : i think the phone is asking for RGCK CODE NOT NCK CODE ..

HERE THE LOG OPERATION : -
Checking Login and Password... OK
Ballance: 30 crd.
You have 30 credit(s) left. This operation takes 10 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G960F
Android version: 9
PDA version: G960FXXS4CSDD
CSC version: G960FOXM4CSDD
Phone version: G960FXXS4CSDF
Product code: SM-G960FZBDNEE
CSC country code: Nordic
CSC sales code: NEE
Phone SN: R58KC3*****
IMEI: 354663100******
HW version: MP 0.900
RF cal date: 20181222
Chip name: EXYNOS9810
Modem board: SHANNON360
Security patch: 2019-04-01
Boot Warranty bit: 0
SIM State: ABSENT,ABSENT
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching server... OK
Checking server answer... modem required
Rebooting phone... OK
Waiting ADB device... OK
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (1)

Done with Samsung Tool PRO v.36.0