g930t unlock error

Every time I try to unlock this model with firmware SG1 I get the error all lower firmware doesnt give me an error, any solution to this?

I tried downgrading to G930TUVS9CSB2 which and doesnt let me, flashed only modem also doesnt let me gives me an error

thank you


Checking Login and Password... OK
Ballance: 282 crd.
You have 282 credit(s) left. This operation takes 8 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G930T
Android version: 8.0.0
PDA version: G930TUVSACSG1
CSC version: G930TTMBACSG1
Phone version: G930TUVSACSG1
Product code: SM-G930TZKATMB
CSC country code: USA
CSC sales code: TMB
Phone SN: R28J43YFSVF
IMEI: 359xxxxxxxxxxxxx
HW version: REV0.6
RF cal date: 2017.04.28
Chip name: MSM8996
Modem board: MSM8996
Security patch: 2019-07-01
Boot Warranty bit: 0
SIM State: 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... OK
Reading data from phone... OK
Rebooting to upload... OK
Searching Ramdump interface... COM315 detected
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... error (1)

Done with Samsung Tool PRO v.37.0