[SOLVED] /oauth/authorize not found (404) from CI

I am trying to use GitLab CI with my new GitLab installation on Debian 7.8, but I get a 404 at /oauth/authorize. Everything else in the GitLab install works fine. The CI correctly redirects to the main GitLab server at that path.

I figured it out. CI 5.4 is only compatible with GitLab 7.7. I had 7.6. I easily upgraded, but this should be more clear in the 5.4 manual install instructions.