j727p unloking problem

Waiting ADB device... OK
Reading phone info...
Model: SM-J727P
Android version: 7.0
Product code: Not Active
Phone version: J727PVPU3AQJ3
PDA version: J727PVPU3AQJ3
CSC version: J727PSPT3AQJ3
CSC country code: USA
CSC sales code: XAS
HW version: J727P.02
Phone SN: 00000000000
Modem board: MSM8953
Security patch: 2017-08-01
RF cal date: 2017.11.02
IMEI: 353559085095402
Writing AT RIL... OK
Initialization AT RIL... root required
Checking Super user right... true
Initialization AT RIL... OK
Unlocking... error

Done with Samsung Tool PRO v.31.1

how can fix this problem