We are running bitbucket server 4.8.3 on an ubuntu 18.04 machine. If we connect to this server using sourcetree 2.6.6 no repositories are diplayed. But the repositories exist. Using webbrowser with the same login as in sourcetree all repositories are visible and editable. We also can clone the repositories by the url of a repository using sourcetree (direct entering url).
With an old version of sourcetree it works fine.
What's going wrong? I don't have any idea.