Open a terminal (Ctrl + Alt + T), and execute sudo mokutil --disable-validation.
Enter a temporary password between 8 to 16 digits (not characters: * &% $ £ "/^etc ...).
Enter the same password again to confirm.
Reboot the system and press any key when you see the blue screen (MOK management).
I searched for a long time on Zorin forum but I did not find it ... I saw that with the last update the action was available, but I chose a password with "*" and it did not recognize it ... Now I have enabled secure bot but I wanted to understand how to access from the terminal.
To check if it is enabled from the terminal do you know the command?
Thanks for your help.