HELP HELP error unlock s8 tmobile

Operation: Unlock
Selected model: SM-G955U
Software version: 31.0

Checking Login and Password... OK
Ballance: 45 crd.
You have 45 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
Product code: SM-G955UZSATMB
Phone version: G955USQU2CRB9
PDA version: G955USQU2CRB9
CSC version: G955UOYN2CRB9
CSC country code: USA
CSC sales code: TMB
HW version: REV1.0
Phone SN: R28J41xxxxx
Chip name: MSM8998
Modem board: MSM8998
Security patch: 2018-02-01
RF cal date: 2017.04.12
IMEI: 357758080xxxxxx
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... error (3.)

Done with Samsung Tool PRO v.31.0