GRUB ISSUE

l've been having this problem for 2 weeks now and trying to resolve it but no avail.
The issue started when I updated rpm and reboot the system. When the system
rebooted, it boot into grub> screen. I didn't know what to do, so i thought reinstalling
the OS from my bootable media would solve the problem but it became worst.

Right now it always get stock at grub> screen. even when I boot into rescue mode
and running the following commands "chroot /mnt/sysimage"
I discovered that that following entries does not exist "efi/EFI/redhat/grub.cfg"
when I run " ls /boot" all i can see is initramfs-3.10.0-862.e17.x86_64.img
and cmlinuz-3.10.0 -862.e17.x86_64. so running "grub2-install -o /boot/efi/EFI/redhat/grub.cfg"
return an error.