Making Bootable USB Drive for Catalina

Hey,
I have a dumb issue at "Install macOS Catalina on Supported PCs": https://www.tonymacx86.com/threads/unibeast-install-macos-catalina-on-any-supported-intel-based-pc.285366/
On step 2.11 : I see an icon Catalina, when I put my mouse on it tells me that it's to create a bootable USB drive...
But I can't click on it, there is no way to pass this step.
Can you guys help me?
Joël

Author: jojow