Does not reboot after update 24

[ysand]

As simple as can be... Indeed.

Installed it Wayland again.

I would like to thank this community for the help. More than words....

My systems works like before. I am really happy!!

Have a great evening.

[Schwarzer Kater]

[…] Do you know if it can be activated again? Or do you advice against using it as it is in progress? I had no issues with Wayland […]

This is the official statement from the Kubuntu release notes (which also include what to do to enable Wayland):
"A Plasma Wayland session is available for testing by installing the plasma-workspace-wayland package, but is not supported. A Wayland session can then be started by selecting it at the login screen."

If you have problems in Wayland just log out and choose X11 in the lower left corner of the login screen instead.
To have both session types installed won't change anything else in your system or make it "slower" or something - Wayland is just not supported yet (I consider it to be in a late Beta stage - perhaps in one or two years the things I need will also work in Wayland…).