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.