G960U AT&T Unlock Error

You have 50 credit(s) left. This operation takes 8 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G960U
Android version: 8.0.0
PDA version: G960USQS3ARI6
CSC version: G960UOYN3ARI6
Phone version: G960USQS3ARI6
Product code: SM2G960UZKAATT
CSC country code: USA
CSC sales code: ATT
Phone SN: R38K7xxxx
IMEI: 353302xxxxxxx
HW version: REV1.1
RF cal date: 2018.07.07
Chip name: SDM845
Modem board: SDM845
Security patch: 2018-09-01
Boot Warranty bit: 0
SIM State: NETWORK_LOCKED
Searching Samsung diag port... detected COM96
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... error (3.0.0.5)
Probably your phone has old security and can not by unlocked by this method

Done with Samsung Tool PRO v.34.6