This is exactly the issue I had!
When I saw your post it was already too late and I had this error at login - openSUSE Paste
But I resolved it here with help from this OP SDDM Theme broken after update to Plasma 6 with no way to change it back?
Then I will use TTY at login screen, it worked this time and it’s easier then to restart for updates via Grub, thanks for the info <3
Thank you guys for the help and assistance, I am sure others will see these posts and be able to make their system work too 
