Try this command to install the grub :
grub-install --efi-directory=/boot/efi/ --target=x86_64-efi --recheck --debug
Where /boot/efi is the directory where the EFI partition (/dev/sda1) is mounted.
I was able to regenerate a grub install with it.
Then run grub by hand in the efi shell.
Try this command to install the grub : =/boot/ efi/ --target=x86_64-efi --recheck --debug
grub-install --efi-directory
Where /boot/efi is the directory where the EFI partition (/dev/sda1) is mounted.
I was able to regenerate a grub install with it.
Then run grub by hand in the efi shell.