Can't log in to Slowroll desktop after latest dup

[Tuner]

I am a new Slowroll user, and just tried my first zypper dup to the Slowroll update 20260508T1745. This brought in over 3,000 packages … but also wouldn’t let me log in. Instead the sddm desktop log-in screen showed these messages:

The current theme cannot be loaded due to the errors below, please select another theme

file:///usr/share/sddm/themes/Sweet-Ambar-Blue/Main.qml.28.1: module "org.kde.plasma.extras" is not installed
file:///usr/share/sddm/themes/Sweet-Ambar-Blue/Main.qml.27.1: module "org.kde.plasma.components" is not installed
file:///usr/share/sddm/themes/Sweet-Ambar-Blue/Main.qml.27.1: module "org.kde.plasma.core" is not installed

… and several more similar lines, which I didn’t copy. I took a photo of the screen and have entered these lines by hand. All refer to missing plasma modules.

Is there a way to fix this by logging in to runlevel 3 and ‘zypper in’ something I don’t have? The KDE desktop was working fine before this update.

I don’t need to use this system right away, so also could wait for a fix in an upcoming snapshot.

[hui]

You seem to use an external (3rd party from KDE store) SDDM theme. Switch back to a supported one like breeze by editing the sddm.conf files.
This can happen when using themes downloaded from the KDE store.

[Tuner]

That did the trick! Thank you, hui. I found the reference to Sweet-Ambar-Blue in /etc/sddm.conf.d/kde_settings.conf, changed it to:

[Theme]
Current=breeze-openSUSE

and rebooted. Problem solved.

FWIW, I had used the migration tool to upgrade this installation from Leap 15.6.