Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/062a48b5eb2e43fbaa2101c666c2e08d : SUCCESS in 4m 24s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f0c70344d20a485ea988871a06c73214 : SUCCESS in 5m 08s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4d1b36de72e440769523f46b55391b9d : SUCCESS in 5m 53s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/496e9a33565041d8a201f88ba1795a65 : FAILURE in 6m 08s