Not able to connect to sitemap url

Not able to connect to sitemap url on https://my.openhab.org/ when client(mobile) and server are on different networks. I am able to access the sitemap from mobile browser but not from the openhab application.

Try https://my.openhab.org/openhab.app

Make sure your username and password are for your my.openhab account, not the users created on your openHAB instance.