Find the Wpa Key if I Have WPS PIN

I used reaver (v1.6) with pixiewps to get the wpa passphrase but it only got me the wps pin using this command:

reaver -i wlan0mon -b -c 1 -S -vv -K -f

now when I use reaver with the pin it gets stuck showing me this error:

! WARNING: Receive timeout occurred. Any help with where should I go from there would be appreciated.