Z3X Server Error???

Have been trying to unlock some S9 from ATT since the morning and keep getting this error and sometimes just gets stuck on Calculating:


UNLOCK INSTRUCTIONS:
Reading codes using sever:
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone'-'Software information'
to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Read Codes via server' button, write your login and password in window if it will appear.
(Login and password will be saved as default after first input and can be changed in settings.)

Operation: Read Codes via Server
Selected model: SM-G965U
Software version: 33.5

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-G965U
Android version: 8.0.0
PDA version: G965USQU3ARG7
CSC version: G965UOYN3ARG7
Phone version: G965USQU3ARG7
Product code: SM-G965UZBAATT
CSC country code: USA
CSC sales code: ATT
Phone SN: R38K20AF9CT
IMEI: 354XXXXXXXXXXXXXX
HW version: REV1.1
RF cal date: 2018.02.22
Chip name: SDM845
Modem board: SDM845
Security patch: 2018-07-01
Boot Warranty bit: 0
Searching Samsung diag port... detected COM15
Reading phone info... OK
Reading data from phone... error (1), 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
Searching Ramdump interface... COM22 detected
Reading data from phone... OK
Calculating...
Exception: Invalid pointer operation

Done with Samsung Tool PRO v.33.5