Some other data.

The router driving my wifi network supplies wifi with wpa2 to several smartphones, an android tablet, two notwbooks.

With my UT tablet I'm trying to connect to the above mentioned wifi netwok which is visible, not an hidden one.

I was never able to connect my UT tablet to my wifi nework with wpa2. When I say I connect using wpa is via a second access point using another identifier and running only the time my tablet needs it. So is not necessary tho delete any entry on the tablet.

A doubt now arise: the password I chosen for my wpa2 wifi network is 30 characters long. I understand that is a very long one, but the UT is able to handle a so long password?

In my tablet following System Settings => Network => Wi-Fi wpa and wpa2 are not displayed at all.
When I try to connect to my wifi network, a little top down appears showing: Connect to "mynetwork" and in the below line: WPA but wpa is greyed out and not clickable. If I try to connect to mynetwork which is wpa2, I obtain no connection and no error messages, nothing.
If I shift mynetwork from wpa2 to wpa I can connect my tablet to it.

Doing sudo wpa_cli status | grep key I obtain no answer. Doing sudo wpa_cli status I obtain Selected interface 'wlan0' and after some rows WPS-AP-AVAILABLE (while the wifi is not connected).

I cannot understand the situation.

Thanks for Your kind answers.

In my Lenovo Tab M10 HD (acquired with UT preinstalled) upgraded to UT 24.04-1.1, I can't find the option wpa2 when connecting to a new WiFi node: the only option I can see is wpa.
Perhaps I'm wrong ?
Thanks.

Massimo