Issue with AMI BIOS

[razer1073]

I bought a Q190G4N S07 from Qotom and I installed OPNsense.  Before installing I could access the BIOS menu (AMI, American Megatrends) but after installing OPNsense, I can no longer get to the boot menu, nothing works.  I took out the SSD and deleted all partitions and formatted and put it back into the MiniPC and now I am just getting the EFI shell prompt.  What is even stranger is that I took apart the PC and took out the battery and even cleared the CMOS with the jumper.  Can someone please tell me what the issue could be?  I've never experienced something like this before.