The error indicates a cryptographic hash does not exist for the Grub rescue tool.
The error indicates a cryptographic hash does not exist for the Grub rescue tool.
You have a laptop that was previously encrypted with LVM. Since you can't recall the encryption password, you're considering reformatting the disk. However, it appears the system is using GRUB rescue, which might be preventing access. There might be ways to bypass this without needing the data, but I recommend consulting a professional or using recovery tools designed for such scenarios.
No, you should not delete all partitions during OS installation.