I thought I’d try XWiki on my test server to get a sense of this new wiki option I have not seen before. The install failed and after looking through the logs it looks like the preinstall script is attempting to download some config files from a docker-xwiki repo on github that doesn’t exist.
Hello! Thank you for reporting this issue. The XWiki team is working on a fix at this moment. We will update this post as soon as the install is fixed.