it's the new overview, the cubes in he sky is the overview of the cell not yet meshed after refresh, if you leave it there for a few secs/mins it will mesh up.
As to the 2D not showing up, try:
- empty cache and ctrl+F5
- delete ew cookies and logout+login again
Are you using a x84 or x64 OS/browser? B/c ew no longer likes to play well with 32bit systems.
if you follow the above steps and still have issues I'd recommend emailing HQ: firstname.lastname@example.org