SM-G955U unlock error app unlock [Answered]

Checking Login and Password... OK
Ballance: 20 crd.
You have 20 credit(s) left. This operation takes 10 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G955U
Android version: 8.0.0
PDA version: G955USQU5CRG3
CSC version: G955UOYN5CRG3
Phone version: G955USQU5CRG3
Product code: SM-G955UZVATMB
CSC country code: USA
CSC sales code: TMB
Phone SN: R28J42NQ18W
IMEI: 357759081503666
HW version: REV1.0
RF cal date: 2017.04.20
Chip name: MSM8998
Modem board: MSM8998
Security patch: 2018-07-01
Boot Warranty bit: 0
Searching Samsung diag port... detected COM171
Reading phone info... OK
Reading data from phone... error (0), skip
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
Rebooting to upload... OK
Searching Ramdump interface... COM81 detected
Reading data from phone... OK
Calculating... error (0)

Done with Samsung Tool PRO v.33.8