Determine WPA2

[drsnooker]

WPA2 requires mode 22000 -m 22000 (you're using MD5 mode 0)
You might have to convert your cap to 22000 format:
https://hashcat.net/cap2hashcat/

./hashcat-src/hashcat -d 1 -m 22000 -a 0 WILLY.hccapx dicts/rockyou.txt --potfile-path WILLY.pot