return my credit , read code failed z3x

[CODE
Checking Login and Password... OK
Ballance: 20 crd.
You have 20 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting for device to become ready... OK
Reading phone info...
Model: SM-G975U
Android version: 9
PDA version: G975USQU2ASG8
CSC version: G975UOYN2ASG8
Phone version: G975USQU2ASG8
Product code: SM-G975UZBAATT
CSC country code: USA
CSC sales code: ATT
Phone SN: R38M20AJGGR
IMEI: 354418101012322
HW version: REV1.0
RF cal date: 2019.02.14
Chip name: SM8150
Modem board: SM8150
Security patch: 2019-06-01
Boot Warranty bit: 0
SIM State: ABSENT
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
Searching server... OK
Waiting for server answer... OK
Calculating... error (1)
Reboot phone and try again.
Check ADB drivers, USB cable. Don't use USB Hubs
If this repeated then reflash phone and make factory reset.

[/CODE]


but now only 15 credit available

user zsc_BuPrOCT8