SNMP Network scan - host is disabled

This is not clear. I have spent 3 hours and did not find a way to enable them. There is NO enable in the host menu.
Why these red crosses are NOT clickable to allow to enable?
Could you, please, list these “few clicks”, or give an instruction, or note this in the documentation?
This is common tech disease to answer like “it is possible” without any hint or instruction.

Also, here are lots of some extinct terms like WAPO, and some non-existing menu entries.
I have installed the 2022 version, so, please, is it possible to show us where is this Enable function can be found and clicked upon, please?
Thanks