Error when creating new project on Gitlab-CE


I have an issue when I create a new project on Gitlab web interface. The error is : Failed to create repository via gitlab-shell.

When i see on the production.log, there are this error : Unable to save project. Error: Failed to create repository. The Gitlab-shell log said : Adding project … The directory project.git is create but is empty.

I have no errors when i execute the command “gitlab-rake gitlab:check”. If i execute the command for the creation of project using the CLI, i have this :

/opt/gitlab/embedded/service/gitlab-shell/bin/gitlab-projects add-project tutu.git
/opt/gitlab/embedded/lib/ruby/2.3.0/fileutils.rb:1564:in `path': no implicit conversion of nil into String (TypeError)
        from /opt/gitlab/embedded/lib/ruby/2.3.0/fileutils.rb:1564:in `block in fu_list'
        from /opt/gitlab/embedded/lib/ruby/2.3.0/fileutils.rb:1564:in `map'
        from /opt/gitlab/embedded/lib/ruby/2.3.0/fileutils.rb:1564:in `fu_list'
        from /opt/gitlab/embedded/lib/ruby/2.3.0/fileutils.rb:207:in `mkdir_p'
        from /opt/gitlab/embedded/service/gitlab-shell/lib/gitlab_projects.rb:173:in `add_project'
        from /opt/gitlab/embedded/service/gitlab-shell/lib/gitlab_projects.rb:59:in `block in exec'
        from /opt/gitlab/embedded/service/gitlab-shell/lib/gitlab_metrics.rb:47:in `measure'
        from /opt/gitlab/embedded/service/gitlab-shell/lib/gitlab_projects.rb:54:in `exec'
        from /opt/gitlab/embedded/service/gitlab-shell/bin/gitlab-projects:29:in `<main>'

I don’t find the exact issue on the web. My version of Gitlab is 9.1.3. I try to upgrade with the version 9.2.0 but i still have this issue. It’s a fresh installation with RPM. I can create users and groups well.

Did you have an idea ?