Hashcat 3.30 problems

[rico]

I don't know if this is the same issue as reported in that 2015 link but I do know that hashcat v3.30 uses a new format .hccapx file now instead: https://hashcat.net/forum/thread-6273.html

You should run hashcat-utils new cap2hccapx tool on your .cap file and try cracking that .hccapx file instead.