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error: file ‘/grub/i386-pc/normal.mod’ not found

I get this error after installing opensuse 15.2 on a Dell Latitude E5410 (~year 2011), where the hard drive was replaced.
I tried default as well as manual setups and partitions.
I tried suggestions from https://askubuntu.com/questions/266429/error-file-grub-i386-pc-normal-mod-not-found. But they do not really apply.

I only get a grub rescue console. I found the (hd0,gpt2)/boot/grub2/ folder, however, it is empty in grub rescue. Why? Booting the linux system help of the usb drive,
I see the many subfolders in /boot/grub2/ including /grub/i386-pc/normal.mod.

Is the empty folder an issue with mounting points (/, /mnt, /boot, etc.) or file system (Ext2, Ext3, Ext4, BtrFS, FAT, XFS, Swap, UDF)? Or other boot setup (legacy, uefi)