When you have only one Open id provider and provided the providerURL option in security domain, the instance is configured as single openid provider mode. The landing page after sign in became 404.
How to reproduce:
change zanata-config.cli line 106 to:
This will add the providerURL option to openid security domain (in this instance we set it to fedora open id)
re-launch your local zanata docker container
after sign in, see dashboard
after sign in, see 404 page