Creatin new account leeds to "page not found"

I think I found the issue:

The SiteURL shouldn't have a team name appended to it. I think if you change the SiteURL setting to be : http://wambachers-osm.website:8065, everything should work fine.

Let me know if that helps resolve it?

I've submitted a pull request to clarify this in our documentation: https://github.com/mattermost/docs/pull/740