Grub 2:2.06.r322.gd9b4638c5-1 won't boot and goes straight to the BIOS after update

I’m following the steps here to fix my installation, however when I try to boot from a USB with the latest ISO it fails and takes me to the BIOS instead. I made sure to boot from the USB with UEFI. The only explanation I could reason for this is that the latest ISO has grub issues as well and I need an older one. Any help would be greatly appreciated. I’m new to Endeavor and Linux but I’m determined to make it work.