Anyone able to get the correct URL for Ekos to make use of Cloud Makers Astrometry for OS X?

www.cloudmakers.eu/astrometry/

It seems Ekos reports:
2017-04-21T17:36:20.423 - DEBG - Alignment: "Solver iteration #1"
2017-04-21T17:36:20.456 - DEBG - Alignment: "Error downloading mountain-lion.local:53695/api/login - server replied: Not Found"
2017-04-21T17:36:20.493 - WARN - Audio notification requested, but sound file from notifyrc file was not found, aborting audio notification

The URL that seems to be used by the submit button for CloudMakers Astrometry is /api/upload/

Ideas?