J250f unlock error

Checking Login and Password... OK
Ballance: 50 crd.
You have 50 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-J250F
Android version: 7.1.1
PDA version: J250FXXU2ARI1
CSC version: J250FOJV2ARI1
Phone version: J250FXXU2ARI1
Product code: SM-J250FZDDKSA
CSC country code: KSA
CSC sales code: KSA
Phone SN: RV8K715PC2V
IMEI: 359661091495826
HW version: MP0.900
RF cal date: 2018.07.27
Chip name: MSM8937
Modem board: MSM8917
Security patch: 2018-08-01
Boot Warranty bit: 0
SIM State: ABSENT,ABSENT
Rebooting phone... OK
Waiting ADB device... OK
Rebooting phone... OK
Waiting ADB device... OK
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK

Verify proof by client... OK
Reading data from phone... OK
Searching Ramdump interface... COM89 detected
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... error (0)
please update phone firmware

Done with Samsung Tool PRO v.34.3