openstack – item not found in create server console

I would like to create server console. It has the below error.

{"itemNotFound":{"code":404,"message":"The resource could not be found."}

I send request to :8774/v2.1/servers/e445.../remote-consoles. The method is POST. The header contains Content-Type: application/json and X-Auth-Token: admin_token.

Input

{"remote_console":{"protocol":"vnc","type":"novnc"}}

My current version is 2.87,with min_version 2.1.