LG K371 Android 7.0 PIN removal?

So I have a LG K371 on Android 7.0(I think)
and it is screen locked with a PIN.
I need to remove this PIN.
I have Z3X box with LG 2-3G Tool v9.48 and when I select my model number and go to Workspace and then select Screen Lock Restet I get the following results.

LG 2-3G Tool v9.48
supported models: 1555

Mode: Emergency
Model: K371
Read info...
Laf Protocol: 01000005
Model name: LG-K371
Software verion: K37120n
Android verion: 7.0
Target operator: ATT
Target country: US
Chipset: msm8909
IMEI: 000000000000000
Elapsed: 4 secs. --> (v9.48)

Phone mode is DOWNLOAD
Start reset screen locks...
Laf Protocol: 01000005
Model name: LG-K371
Software verion: K37120n
Android verion: 7.0
Target operator: ATT
Target country: US
Chipset: msm8909
IMEI: 000000000000000
Init EXT4 ...
Truncate file 0... done
Truncate file 1... not found
Truncate file 2... not found
Truncate file 3... done
Truncate file 4... done
Truncate file 5... done
Save EXT4...
Laf cmd error: LAF_CMD_WRITE fail[LAF_ERROR_UNKNOWN[80000121]].
Error reset locks
Elapsed: 175 secs. --> (v9.48)

I hope someone can help me with a solution to this problem.