SDDM troubles in plasma 6

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SDDM Theme broken after update to Plasma 6 with no way to change it back?

Hello, after upgrading to KDE Plasma 6, my SDDM theme no longer works. I was using a custom theme, which probably isn’t compatible with KDE Plasma 6. That’s okay, I could just change it back to the default breeze theme, but there is no SDDM setting in plasma settings like it used to in Plasma 5. What can I do to fix SDDM? Here is the error message, though it’s probably not necessary for what I need help with: The current theme cannot be loaded due to the errors below, please select another th…