No Entry sign on boot - No mapping returned from cdboot.efi

Trying to fix my USB 3 issues, I now have an no entry sign displayed on boot and cannot access the MacOS.

There is an empty HDD in the computer that I want to use to install Windows 10 on. I made the USB install drive on my MacBook and am now getting an error: No mapping returned from cdboot.efi

Is there anyway to fix and salvage my install? Help please

submitted by /u/_Mighty_Boosh
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