"Entry "xx.xx.xx.xx-xx.xx.xx.xx" is not a valid hostname or IP address."
Entry "10.0.0.1-10.0.0.10" is not a valid hostname or IP address.
Hosts can be entered as a single IP address, a range (separated with a minus sign, e.g. 10.0.0.1-10.0.0.10) or a fully qualified domain name.
Currently the assumption is 22.1.2 - 22.1.6. If that could be narrowed down further that would be helpful.