Galaxy Note 9 SM-N960F Unlock Error

Operation: Read Codes via Server
Selected model: SM-N960F
Software version: 33.7

Checking Login and Password... OK
Ballance: 40 crd.
You have 40 credit(s) left. This operation takes 10 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-N960F
Android version: 8.1.0
PDA version: N960FXXU1ARH5
CSC version: N960FOXM1ARGD
Phone version: N960FXXU1ARGC
Product code: SM-N960FZBDINS
CSC country code: India
CSC sales code: INS
Phone SN: RZ8K80R34AT
IMEI: 359447090417627
HW version: MP 0.700
RF cal date: 20180810
Chip name: EXYNOS9810
Modem board: SHANNON360
Security patch: 2018-08-01
Boot Warranty bit: 0
Searching server... OK
Checking server answer... OK
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK
Verify proof by client... OK
Executing... error (3.8.1)
Reboot phone and try again.
If this repeated then reflash phone and make factory reset.

Done with Samsung Tool PRO v.33.7

factory reseted,Flashed with latest build firmware,still same error