I’ve tasked the search function and have seem to found the issue; the alive detection doesn’t work if IPv6 is disabled. Therefore, you have the options to:
- Re-enable IPv6
- Set the alive detection to “Consider alive”, which will drastically increase scan time if you have an IP range as target that contains not alive hosts.
References:
https://forum.greenbone.net/t/arpv6-icmpv6-socket-address-family-not-supported-by-protocol/
https://forum.greenbone.net/t/if-experiencing-interrupted-0-read-here-for-possible-cause/