High Sierra install - Spinning wheel on gray screen

I feel like I'm missing something super simple, I followed the guide on tonymacx86 on how to create a High Sierra install USB and I can't get my system to boot past the gray screen with the spinning wheel. I read that some people had luck remaking the USB drive but I have done it three times with the same result.

Any help or insight is appreciated!

submitted by /u/C0RN31L
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