Error while creating Gitlab issue

[lutaiphong]

I got this error

Error creating issue: [u"Error Communicating with GitLab: HTTPConnectionPool(host='git.eton.vn', port=80): Max retries exceeded with url: /api/v4/user (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fb032dbd8d0>: Failed to establish a new connection: [Errno 111] Connection refused',))"]

The access token for sentry-gitlab already has api and read_user scope.
The git server is: git.eton.vn

Please help me on this.