Thank you for using Ubuntu and taking the time to report a bug. This should work ok if ipv6 is blacklisted, the problem is that ufw doesn't handle when ip6_tables.ko is not available. This will be fixed in a future update.
Thank you for using Ubuntu and taking the time to report a bug. This should work ok if ipv6 is blacklisted, the problem is that ufw doesn't handle when ip6_tables.ko is not available. This will be fixed in a future update.