Error when creating uniBeast High Sierra USB

I have downloaded High Sierra from the app store, and I am trying to create a High Sierra bootable USB to upgrade from El Capitan to High Sierra.

During the uniBeast setup I am greeted with the following message: https://imgur.com/a/fhFCc

I have tried setting my date to 2012 since that fixed the problem for some according to forums. Also I have redownloaded the installer. With no succes.

I am hesitant to update to High Sierra trough the app store without making a bootable USB first.

submitted by /u/jordakoes
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