sm-a520f unlock failed HELP

Unlock4samsung Tuesday, February 27, 2018

Chimera Mobile Phone Utility version: 16.67.1014 @ 2018-02-27

Printing phone history

Read Codes Online
27/02/2018
17:21:52

Read Codes Online
27/02/2018
17:20:17

Read Codes Online
14/02/2018
17:39:39

Read Codes Online
14/02/2018
17:38:47

[Read codes started]

Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-A520F
Sales Code: ZTO
Country Code: Brazil
Timezone: Africa/Lagos
Android Version: 7.0 [NRD90M]
Build Date: Thu Aug 3 11:05:15 KST 2017
PDA Version: A520FXXU2BQH4 [august 2017, rev4]
Phone Version: A520FXXU2BQG7 [july 2017, rev7]
CSC Version: A520FZTO2BQH2 [august 2017, rev2]
Product Code: ZTO
HIDSw Version: A520FXXU2BQH4/A520FZTO2BQH2/A520FXXU2BQG7/A520FXXU2BQH4
Board Platform: EXYNOS5
Modem Platform: SHANNON325
Serial Number: R58JA42G4DZ
Imei: 353627095933662
Unique Number: CBJ00B217466394
Connections: AT,MTP
Battery Status: 3.97V (61%)
Network Type: GSM
SIM Status: NETWORK_LOCKED
Multisim Config: SS
Knox Version: v30
Warranty Bit: 1
Security Patch: 2017-08-01
Data Encryption State: encrypted

Reading Codes Online...
WARNING! The knox is not 0. The warranty is void! The phone will not respond.
Searching serial port. Be patient! Do NOT disconnect the phone!
Serial port is not responding.
Finished at local time: [02.27.18 18:30:21]
WorkID: 34032384

PLease what should i do in dis case