Hi Massimo,
Thanks for sending those screenshots! It looks like you are using the Local Network Clients filter at the top, which is filtering out all wireless clients:
This means that you are only looking at hard-wired clients through an experimental IP scanning algorithm.
To see all wireless and wired clients on your network, click on the All Connected Clients filter:
Are you now able to see your wireless laptop?
Note that you can also view clients on your network under See All Networks by diving into the Network and Radio details of your SSID, like this:
