That is a Github issue. If you mark a repository on Github as template repository, they create this nice green button, "Use this template", which links to `<repo-url>/generate`, but this button is only visible to logged in users, and URL only works for logged in users.

This is very inconvenient for people who create template repositories. This becomes especially problematic, and makes me wonder what Github product managers are smoking really, that the big green "Use this template" only shows up on wide screen, if your browser is not wide enough the Github product team has decided to hide the most important button of the page.