J320AZ Unlock error

Operation: Read Codes
Selected model: SM-J320AZ
Software version: 27.1

Searching Samsung modem… detected COM3
Reading phone info… ok
Model: SM-J320AZ
AP version: J320AZTUU2APJ2
CSC version: J320AZAIO2APJ2
CP version: J320AZTUU2APJ2
Product code: SM2J320AZWZAIO
Phone SN: R28H43HARLJ
Unique number: CQ300842BD33E43
Reading IMEI… ok
IMEI: 356519072056756 (SIGN: OK)
Checking hash file… ok
Reading data from phone… error (0)
Try downgrade modem if possible

Done with Samsung Tool PRO v.27.1
____________________________________

Operation: Unlock
Selected model: SM-J320AZ
Software version: 27.1

Searching Samsung modem… detected COM3
Reading phone info… ok
Model: SM-J320AZ
AP version: J320AZTUU2APJ2
CSC version: J320AZAIO2APJ2
CP version: J320AZTUU2APJ2
Product code: SM2J320AZWZAIO
Phone SN: R28H43HARLJ
Unique number: CQ300842BD33E43
Reading IMEI… ok
IMEI: 356519072056756 (SIGN: OK)
Reading data from phone… error (0)
Try downgrade modem if possible

Done with Samsung Tool PRO v.27.1
____________________________________