Stuck at "Please switch to XPC or bootstrap_check_in(): com.apple.bsd.dirhelper" during Mojave Downloader

I made an installer USB with UniBeast (I have Sierra on a hard drive that I have)

When booting I get the line "Please switch to XPC or bootstrap_check_in(): com.apple.bsd.dirhelper" Then the boot continues with 3 or 4 more lines and then is stuck at the same message...

I made this with this guide.

My pc specs:

Motherboard: MSI B250M Gaming Pro

Graphics: rx 560 4gb

CPU: i5-7400

RAM: 8gb DDR4

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Thanks!