grub problems booting my server

Hi. I used a raw disk and created a DEbian 9 server using lvm and other tools. My config profile has the kernel boot as grub. My problem is that when I boot the system, I get a grub prompt rather than the menu and when I type exit, the grub menu comes up normally and the system boots fine. Also, the disk I created was a gpt disk -- I was unaware there was any problems doing this, but I found out I had to create a BIOS partition and once that was done and grub installed, the system boots normally, after I get the grub prompt and exit that.

Thanks in advance for any suggestions.