Here's the error. I reformatted a couple of times and still getting the same thing. I am making highsierra, UEFI usb. I'm new to this so I'm not sure what this means.
I had the same problem, but resolved it by partition the stick via Terminal. If you open Disk Utility and the Partition tab is greyed out, it means that the partition table is not GUID. And erasing/reformatting the stick doesn't change this.
In Terminal I did the following:
diskutil list (to determine the disk number; also possible in Disk Utility)
diskutil partitiondisk diskX 1 GPT JHFS+ USB Xg (diskX = disk number, e.g. disk4; Xg = capacity in GB, e.g. 10g)
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