problem to unlock LG t450

Welcome to Octoplus/Octopus Box LG Software version 2.8.8
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Checking data...OK
Platform: LG Qualcomm
Selected port: COM217
Selected model: TP450
Reading info...
Model ID: LG-TP450
IMEI: 357016-08-030477-2
Android version: 7.0
Battery level: 50%
SW Version: TP45010j
Mode: Emergency
Initializing flash...OK
SW version: LGTP450AT-01-V10j-310-260-AUG-17-2018-ARB00+0
Android version: 7.0
LAF Version: 1.1
Product ID: CD23S170426001512
IMEI: 357016-08-030477-2
Target operator: TMO
Hardware: rev_10
Switching to Normal mode...
Trying to enable Diagnostics ports...Failed!
Trying to enable Diagnostics ports...
Initializing ADB...OK
Waiting for phone...OK
Diagnostics ports are enbled!
Switching to Serial Port...Failed!
Trying to enable Diagnostics ports...
Checking root access...
Phone is already rooted.
Diagnostics ports are enbled!
Switching to Serial Port...
Failed!
Please perform the following steps:
1. Disconnect cable
2. Put phone into Normal mode manually
3. Press "Ok" button
Trying to enable Diagnostics ports...Failed!
Trying to enable Diagnostics ports...
Failed!
Checking root access...Failed!
Error code: ADB0000001
Performed by 2.8.8 Software version.