MountEFI Gives Message 'There is no EFI partition associated with disk6s1'

I used diskutil to erase>MacOS Extended (Journaled) to erase the USB. I entered the command used in the opencore guide and everything worked fine, it ran through and worked without issue. Moving onto MountEFI, I used the git clone option, and everything ran smoothly until I chose my disk. I was given the error. I did some research and came up with nothing. Please help me out.