Lg h87220g unlock fail

DEAR TEAM
i will try to too many attempt but still same result how too fix tell me

Welcome to Octoplus/Octopus Box LG Software version 2.9.2
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Checking data...OK
Platform: LG Qualcomm
Selected port: COM536
Selected model: H872
Reading info...
Model ID: LG-H872
IMEI: 357271-08-172085-2
Android version: 8.0.0
Battery level: 86%
Mode: Normal
Firmware compiled date: Dec 19 2018
Firmware compiled time: 22:00:00
Firmware released date: Dec 28 2018
Firmware released time: 16:57:55
SW Version: MPSS.TH.2.0.1.c3.1-00028-M8996FAAAANAZM-
1.167449.1.182474.1
IMEI: 357271-08-172085-2
Bluetooth address: B4:F1:DA:16:57:AB
Wi-Fi MAC address: 10:F1:F2:8D:4C:7C
SPC: 000000
Checking root access...
Initializing ADB...OK
Waiting for phone...OK
Phone is already rooted.
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Connecting to server...OK
Octopus smart card is present.
Checking smart card...OK
Username: Pklahorepk
Authorizing...OK
Checking balance...OK
Checking operation...OK
Sending device information...OK
Get credits, needed for current operation...OK
Your balance: 100 credits.
To perform "Unlock" operation you need to have 100 credits.
Sending data to server...
Sending exploit...OK
Executing exploit...OK
Calculating. Please Wait...
Step 1.a2...Failed!
Step 4.a2...Failed!
Trying second method...
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Checking data...OK
Platform: LG Qualcomm
Selected port: COM536
Selected model: H872
Reading info...
Model ID: LG-H872
IMEI: 357271-08-172085-2
Android version: 8.0.0
Battery level: 86%
Mode: Normal
Firmware compiled date: Dec 19 2018
Firmware compiled time: 22:00:00
Firmware released date: Dec 28 2018
Firmware released time: 16:57:55
SW Version: MPSS.TH.2.0.1.c3.1-00028-M8996FAAAANAZM-
1.167449.1.182474.1
IMEI: 357271-08-172085-2
Bluetooth address: B4:F1:DA:16:57:AB
Wi-Fi MAC address: 10:F1:F2:8D:4C:7C
SPC: 000000
Checking root access...
Phone is already rooted.
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Connecting to server...OK
Octopus smart card is present.
Checking smart card...OK
Username: Pklahorepk
Authorizing...OK
Checking balance...OK
Checking operation...OK
Sending device information...OK
Get credits, needed for current operation...OK
Your balance: 100 credits.
To perform "Unlock" operation you need to have 100 credits.
Sending exploit...OK
Executing exploit...OK
Sending data to server...
Step 1.a2...Failed!
Step 4.a2...Failed!
Unlock Failed
Please, reboot the phone and try again.
Rebooting phone...
Performed by 2.9.2 Software version.