Install Discourse on Ubuntu 20.04 or 22.04?

I wouldn’t recommend touching the one-click install at digital ocean. It’s a third party packaging of Discourse and if you’re using that then we can’t really offer you any assistance here.

Have you read through the standard install guide?

  • The default of the current supported LTS release of Ubuntu Server works fine. At minimum, a 64-bit Linux OS with a modern kernel version is required.

Per the above, 22.04 LTS is fine to build on.