Catalina USB Installer not recognised

Hi, I've created a USB installer for Catalina, using Unibeast 10.3.0. It successfully created the USB installer, but when I try to boot from it, it won't boot. First, it's seen simply as "Sandisk" in the F12 boot menu...(the equivalent working Mojave installer I have is seen as "UEFI Sandisk") and if I select "Sandisk" it just defaults back to my Win 10 SSD that's in the same PC. It's as if the USB installer was empty, but ofc it's not. I've tried in USB 3 and USB 2 ports and no luck. Any...

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Author: MacLi