Any way to fix?: After latest KDE udpate, login is with a11y keyboard, and window switcher broken

On KDE Neon, applied latest updates yesterday, and now on the KDE login screen (after disk de-encryption), I have to use the on-screen keyboard to enter my password; and when the desktop does load, I get an error about missing resources every time I use the window switcher.

Has anyone else experienced this? Is there any way to fix it from the user end?