I use Ubuntu 18.04 LTS and I'm having the problem that the classical network manager has as maximum security authentication WPA & WPA2 Personal.
The problem is that I want to have access to networks with WPA3-Personal authentication and I'm not able to connect to them in this moment.
Can someone to explain me how to fix this problem? Maybe the installation of a packet, library or even reinstalling Ubuntu 18.04 LTS will fix the problem? I don't know.
Please see these bug reports: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1844422 and also: https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/1848339 WPA3-SAE capability is included in Network Manager version 1.20-2 and associated packages.
I know of no way, however, to reliably install the later versions of Network Manager, wpa-supplicant, et al on to Ubuntu 18.04 LTS.
I recommend that you install a fully updated version (Ubuntu, lubuntu, kubuntu, etc.) of 19.10. I suspect that WPA3-SAE will then work properly.