"Found packet with bad FCS, skipping..." this is what I get when I use wash tool

Code:
root@localhost:~# wash -i mon0

Wash v1.4 WiFi Protected Setup Scan Tool
Copyright (c) 2011, Tactical Network Solutions, Craig Heffner <cheffner@tacnetsol.com>

BSSID                  Channel       RSSI       WPS Version       WPS Locked        ESSID
---------------------------------------------------------------------------------------------------------------
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
[!] Found packet with bad FCS, skipping...
^C
and it keeps on going until I press ctrl+c
it used to work when I first installed Kali, but I have no idea what happened