LG M250N frp not removed

Logs:-

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

Start flashing.
Start reset FRP...
Laf cmd error: could not open port.
Reset error.
Elapsed: 0 secs. --> (v9.48)

Start flashing.
Start reset FRP...
Laf cmd error: could not open port.
Reset error.
Elapsed: 0 secs. --> (v9.48)

Start flashing.
Start reset FRP...
Laf Protocol: 01000005
Model name: LG-M250n
Software verion: M25012q
Android verion: 7.0
Target operator: GLOBAL
Target country: COM
Chipset: mt6750
IMEI1: 35494xxxxxxxxxxx
IMEI2: 350305260000001
Init EXT4 ...
Laf cmd info: send LAF_CMD_IOCTL, retry #1
Laf cmd info: send LAF_CMD_IOCTL, retry #2
Laf cmd info: send LAF_CMD_IOCTL, retry #3
Laf cmd error: LAF_CMD_IOCTL could not write.
Reset error.
Elapsed: 125 secs. --> (v9.48)