Do you have a [filter:federation_extension] in your paste configuration?
https://github.com/openstack/keystone/blob/7d9b8dcb1221ea9e3ea5988a1c0498fb90b84c98/etc/keystone-paste.ini#L39-L40
Do you have a [filter: federation_ extension] in your paste configuration?
https:/ /github. com/openstack/ keystone/ blob/7d9b8dcb12 21ea9e3ea5988a1 c0498fb90b84c98 /etc/keystone- paste.ini# L39-L40