Comment 2 for bug 1486678

So nice you asked Stefano. I've made a search through all the pages of the API with the pattern '/zh/' in the URL, and I've found is not an isolated issue. Here's the list I've retrieved:

https://ask.openstack.org/zh/question/12070/my-instance-can-not-obtain-ip/
https://ask.openstack.org/zh/question/4143/openstack-with-vmware-esxi-as-hypervisor/
https://ask.openstack.org/zh/question/25877/when-the-public-endpoint-will-be-used/
https://ask.openstack.org/zh/question/5396/helpvolume-attach-to-instance-not-success/
https://ask.openstack.org/zh/question/9307/openstack-network-settinghow-to-set-flat_interface-and-public_interface-in-this-situation/
https://ask.openstack.org/zh/question/9548/installation-nova-computer-kvm-problems-encountered-for-grizzly/
https://ask.openstack.org/zh/question/5088/how-many-instance-could-openstack-create/
https://ask.openstack.org/zh/question/6196/programmingerror-programmingerror-1146-table-novaservices-doesnt-exist/
https://ask.openstack.org/zh/question/5858/set-admin-password-is-not-implemented-by-this-driver-or-guest-instance/
https://ask.openstack.org/zh/question/5284/can-the-openstack-nova-computing-node-be-directly-installed-on-the-exsi/
https://ask.openstack.org/zh/question/5089/an-instance-couldnt-release-its-resourcevcpu-rom-etc-only-if-it-is-terminated-and-whats-the-reason-could-somebody-tell-me/
https://ask.openstack.org/zh/question/4544/openstack-instance-status-error/
https://ask.openstack.org/zh/question/4138/is-grizzly-compatible-with-mysql-cluster/
https://ask.openstack.org/zh/question/4050/instance-cannot-be-boot-after-power-maintenance-of-openstack-server-farm/
https://ask.openstack.org/zh/question/3744/the-proxy-node-in-swift/

All of them matches the same behavior, the API question has the URL with the chinese path which seems to be wrong.

Replacing it with the /en/, the issue works.