/ws/rest/v1/concept url is not working

I have downloaded the latest source code for Webservices module and tested against the openmrs1.11 version. When I hit the /ws/rest/v1/concept url it throws an exception resource not found.

See
https://wiki.openmrs.org/questions/80382290/answers/80382543

E.g. if you visit http://devtest01.openmrs.org/openmrs/ws/rest/v1/concept you get this error:

Unknown resource: v1/concept