N950U AT&T read codes via server error

Checking Login and Password... OK
Ballance: 10 crd.
You have 10 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-N950U
Android version: 8.0.0
PDA version: N950USQU5CRIA
CSC version: N950UOYN5CRIA
Phone version: N950USQU5CRIA
Product code: SM-N950UZKAATT
CSC country code: USA
CSC sales code: ATT
Phone SN: R38JA09M8HB
IMEI: 358502083028319
HW version: REV1.0
RF cal date: 2017.10.17
Chip name: MSM8998
Modem board: MSM8998
Security patch: 2018-09-01
Boot Warranty bit: 0
SIM State: NETWORK_LOCKED
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... COM8 detected
Reading data from phone... OK
Calculating... error (0)

Done with Samsung Tool PRO v.34.3