[Sugguestion]

[Dvalin21]

Hello. Thanks for writing this, but something probably needs to be mention before doing all this.
All of this doesn't work unless you have enable the no subscription repos and others. I would suggest adding Proxmox VE Helper Script "Post Proxmox Install Script" by tteck https://tteck.github.io/Proxmox/ Then still once this is done and it has you reboot, run the following commands as the headers will need to be installed $ apt install pve-headers-$(uname -r)
Once all this is completed, then installing this and other packages will be a breeze. Thanks for your time.