Estoy tratando de iniciar el contenedor docker desde este tutorial (Inicio rápido de instalación y tutorial): https://zuul-ci.org/docs/zuul/admin/quick-start.html#start-zuul-containers

 WARNING: The no_proxy variable is not set. Defaulting to a blank string. WARNING: The http_proxy variable is not set. Defaulting to a blank string. Building node Traceback (most recent call last): File "/usr/bin/docker-compose", line 11, in <module> load_entry_point('docker-compose==1.17.1', 'console_scripts', 'docker-compose')() File "/usr/lib/python2.7/dist-packages/compose/cli/main.py", line 68, in main command() File "/usr/lib/python2.7/dist-packages/compose/cli/main.py", line 121, in perform_command handler(command, command_options) File "/usr/lib/python2.7/dist-packages/compose/cli/main.py", line 952, in up start=not no_start File "/usr/lib/python2.7/dist-packages/compose/project.py", line 431, in up svc.ensure_image_exists(do_build=do_build) File "/usr/lib/python2.7/dist-packages/compose/service.py", line 318, in ensure_image_exists self.build() File "/usr/lib/python2.7/dist-packages/compose/service.py", line 923, in build shmsize=parse_bytes(build_opts.get('shm_size')) if build_opts.get('shm_size') else None, File "/usr/lib/python2.7/dist-packages/docker/api/build.py", line 238, in build self._set_auth_headers(headers) File "/usr/lib/python2.7/dist-packages/docker/api/build.py", line 285, in _set_auth_headers self._auth_configs, registry File "/usr/lib/python2.7/dist-packages/docker/auth.py", line 97, in resolve_authconfig authconfig, registry, store_name File "/usr/lib/python2.7/dist-packages/docker/auth.py", line 142, in _resolve_authconfig_credstore 'Credentials store error: {0}'.format(repr(e)) docker.errors.DockerException: Credentials store error: StoreError('Credentials store docker-credential-secretservice exited with "The connection is closed".',)

¿Qué puede estar causando este error? ¿Cuál es la solución para ello?

Intenté reinstalar docker-compose y docker.io, pero no tuve éxito.

Gracias.