A520F unlock error Help

Checking Login and Password... OK
Ballance: 40 crd.
You have 40 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-A520F
Android version: 7.0
PDA version: A520FXXU4BRB6
CSC version: A520FOJV4BRB1
Phone version: A520FXXU4BRAH
Product code: SM-A520FZKAINS
CSC country code: UAE
CSC sales code: XSG
Phone SN: R58JC0MQ6TA
IMEI: 354071098519039
HW version: MP 0.401
RF cal date: 20171206
Chip name: EXYNOS7880
Modem board: SHANNON325
Security patch: 2018-02-01
Boot Warranty bit: 1
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
Reading data from phone... error (1.8.1)
Reboot phone and try again

Done with Samsung Tool PRO v.32.4
I need your help Please:confused: