UNSOLVED MMM-NetworkScanner - arp-scan not working

[sonicgoose]

Just installed MMM-NetworkScanner but it keeps reporting NO DEVICES ONLINE, even though all devices on my network are assigned static ip addresses and I tried both ip and mac address in the config file. I went back to the install instructions and tried running arps2mm.sh (after updating arp-scan) and got this error:

ERROR: failed to send packet: Resource temporarily unavailable

So I tried running the arp-scan manually (same command that’s in arps2mm.sh) and I got the same error. Is arp-scan broken? Shouldn’t matter, though, because ping works, and isn’t that what MMM-NetworkScanner should be using?