Cannot run RHEL 7 from USB /dev/boot missing

I'm having some issues trying to test my USB installer for RedHat Enterprise Linux Desktop Workstation. From the boot screen I selected Test RedHat and Install, but after a while I get hit with bunch of errors from

dracut-initqueue

/dev/boot

I have the DVD iso on the USB installer, assuming that's the right one to use, same as every other Linux installer that uses DVD in its name. I have never encountered such an error as this before and it's stupid error and that. Why am I having such issues with a usb installer that is missing a critical part as

/dev/boot

How do I fix this issue?
Another thing is it says I should copy some text file to a USB so I can share it's details, but I can't even use the usual commands for seeing the USB storage device names with

fdisk

For something that's highly regarded enterprise level systems, this doesn't even look it if it fails the simplest of things when running from a USB stick.