Xuewen,
Thanks for the promote reply.
I don't get the Portal login page with the two buttons like the attached picture. Instead, I get a black pop-up box with the following content and rough layout:
A username and password are required to
access arcgis/sharing/rest on https://
[host]/arcgis/sharing.
Username:
[input box here]
Password:
[input box here]
OK Cancel
Are there different versions of ArcGIS Earth V1.2, ie. an enterprise version?
Have a great weekend,
Ben