KDE desktop doesn't start after recent update

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up-to-date Kubuntu 25.04 , KDE

I cannot login to my Kubuntu 25.04 after yesterday update. I have a login screen and when I login, I can see my wallpaper for a moment, and then the screen/mouse cursor blinks a few times, and after around 10 seconds I’m back at login screen. In the logs I can see some KDE problems and crashes, but I don’t know where to start and how to troubleshoot that.

I took journal dump (from terminal) Ubuntu Pastebin

I see a lot of crash stacktraces for KDE6 etc. apps. Anyone can help ?

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Please post the contents of /var/log/apt/history.log starting from the entry for the problematic update, through to the last logged entry

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