Error during creating Unibeast drive

[angulon]

hi,
during creating my UniBeast drive -usb- there is a message:
Copy of apfs.efi failed.

my system:
iMac 21.5" mid 2011, 16 GB DRAM, 500 GB SSD Samsung EVO 850
mac OX:
High Sierra 10.13.1

what has going wrong, can somebody help me please.

 

[trs96]

https://www.tonymacx86.com/threads/unibeast-8-troubleshooting-notes.235489/