A520F Unlocking error

Hi, Supporter!
Help please, with unlock this phone.
Do everything with instruction.
Here is the log of read info:

Code:

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Searching Samsung modem... detected COM61
Reading phone info...
Model: SM-A520F
AP version: A520FXXS4CRE1
CSC version: A520FDDX4CRD6
CP version: A520FXXU4CRD3
Product code: DTM
Phone SN: R58J3243XMH
IMEI: 35766108*******
Unique number: CBJ10F0ADC08D14
Reading IMEI... OK
IMEI: 35766108******* (SIGN: UNKNOWN)

Done with Samsung Tool PRO v.33.2

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And when try unlock get error:

Code:

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Searching Samsung modem... detected COM61
Reading phone info...
Model: SM-A520F
AP version: A520FXXS4CRE1
CSC version: A520FDDX4CRD6
CP version: A520FXXU4CRD3
Product code: DTM
Phone SN: R58J3243XMH
IMEI: 35766108*******
Unique number: CBJ10F0ADC08D14
Reading IMEI... OK
IMEI: 35766108*******
Reading SN... error (1)
Done with Samsung Tool PRO v.33.2

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