While I was backing up a few containers in Proxmox today, one of them became unresponsive. I tried to cancel the backup but it just became locked. Restarting the server didn’t help, so after browsing the Proxmox support forms, I found the following solution detailed below.
Every time you log in to Proxmox or update it, there’s an error that pops up telling you that you haven’t purchased an enterprise license key. If you are using Proxmox in an enterprise environment, I would recommend buying a license (even though it’s not required). You’ll get access to an enterprise repository that contains stable security and software updates. But if you run Proxmox non-commercially and want to remove the no subscription error messages, follow the instructions below.