Hey, I'm getting the same error. Do you know how you fixed it?
I followed the normal procedure.. Previously this had happened to the install USB but I fixed it somehow, I think it was after adding NullCPUManagement.kext but it is not working for an installed copy which gets the same error..
Kernel version is set as 11.0.0.. This is wrong? Help!
EDIT: Nevermind I got it to work, just had to start from scratch..