Proxmox Problem Solving

We are currently experiencing a boot-up issue with our home server, Proxmox, that is similar to the error outlined in this forum thread: https://forum.proxmox.com/threads/system-unbootable-grub-error-disk-lvmid-not-found.98761. I would greatly appreciate any assistance in resolving this issue and would welcome any solutions or backup plans that may be suggested.