That error will also manifest after an earlier failed install attempt that creates an efi with fedora. Afaik it will manifest as long as you boot with an existing efi partition with a linux entry. If that's the case, you can follow the video to remove the efi, reboot and try again. Using a usb port directly on the motherboard is also the best way to go. If you can wait and have a possibility to make a new install usb, using the beta iso is your best bet. It has mitigations for some install issues.