Help Needed with Ceph on Proxmox - "Binary not installed - ceph-mon (500)"

Hello,

I am currently trying to learn Ceph for production use.

I have a 3-node setup with 12 OSDs, 3 monitors, and 3 managers. It took several attempts to get to this point, as I encountered nearly every error that can occur with Ceph. After a full reinstall of Proxmox, everything seems to be working fine.

However, I am facing one issue: when I try to create a pool, I receive the following error:
Binary not installed - ceph-mon (500)

When I run whereis ceph-mon, it returns:
ceph-mon...

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