I never saw the error that the page mentions.
I will however check the bios to see if secure boot is enabled.
I remember though, turning it off because it caused trouble with my 100% legal win10.
I just tried this:
`mokutil --sb
EFI variables are not supported on this system
`
If I understand the problem right, my opensuse tumbleweed disk is not bootable anymore.
With an usb stick inserted, the tumbleweed installation USB, I am through the rescue system able to boot Tumbleweed. (option boot a Linux system)
Typing this from Tumbleweed, but as soon as I reboot, windows boots
sudo mokutil --set-sbat-policy delete
[sudo] wachtwoord voor root:
EFI variables are not supported on this system