hey, once i have done this metod with efistudio and everyfing was ok but now i have same problem i cant boot after change. so today second time install we never dont stop
Ensure that you have EthernetBuiltIn=No, otherwise it won't boot.
EDIT: Additionally, you could delete all network interfaces after adding hex and before first reboot, and then, after reboot add it again.
Also, boot with -v and check kernel informations why it isn't booting.