HTTP Status 404 – Not Found means the server is not reachable on the attempt of accessing its service. This usually happens when the server is down.
Whenever this happens, you can always switch to demo.openmrs.org or use your local instance for your testing purposes.
Have just resurrected the qa-server and you should be able to access its service. Just refresh your browser and all will be well.
Thanks @kdaud …Resolved and the advise…