[Openstack-stable-maint] Stable check of openstack/horizon for ref refs/heads/stable/train failed

Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/513689b43f024795b9ef6b9b3e8165bf : SUCCESS in 10m 23s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/eb39874444734d59940fda7982012a4c : SUCCESS in 12m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c544b623ce3642038fb52b7970c50708 : SUCCESS in 10m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6477c649ef3f44f3a41833aa2dd4351b : FAILURE in 4m 41s