docker-reviewboard: Can't create repository

I am trying to add a regular git repository hosted in my network but keep getting errors.

When I go to http://<myip>:8000/admin/db/scmtools/repository/add/ and try to add a repository, the only option I am allowed to select for Repository Hosting is

Everything else requires a PowerPack. e.g.

In that case, the next field, Repository Information only has two options:

Both of them give me errors.