I thought perhaps it could be the card, so I tried installing Linux Mint and that worked just fine. I've re-installed Zorin 17 Pro and have the same error. It's a fresh install, all I've done so far is to run an update, and I don't know what to do from here - I just want to play Diablo IV!
The screenshot indicates a manual installation of the driver - is the system telling lies? Did you try installing Zorin with the option to install with 'latest nvidia drivers'?
OK, think I saw something about this elsewhere. When you login to Zorin you are using the Wayland compositor (the thing that draws the desktop). Logout of Zorin,
select your username at the login screen but don't answer your password. A cog appears lower right. Click on it and select 'Zorin on xorg'. The enter your password and login - do you still have the same issue?
To make an Addition to that: When you installed it with the modern Nvidia Drivers it installs the 550 Driver. Because this one is newer that the Drivers on the List in the ''Additional Drivers'' Tab it isn't listed there and the last Option ist shown.
If You should have the 6.8 Kernel installed, the 545 Driver that @Aravisian named in the command could causing Issues. There would be the 535 or 550 Driver a better Solution. Take a Look at this Post for that: