Installation of BRHypervisor 1.7.0 on brl-12_1.0.3

I do not cause of your issue, but for beginning you can check this Hypervisor Installation Guide: Windows (WIP). It is for Windows but BIOS settings should be the same, make sure that you have installed hypervisor driver properly. In the past colleagues reported that this video https://www.youtube.com/watch?v=MbWZp8950_c&t=146s also helped a lot.