Strange. I read that 40 languages were supported. But when I went to create a workspace, Java did not appear in the list of templates. OK, so I tried to create a blank workspace. I got a report 404 page not found. Not an auspicious beginning. So I tried to create it again, and it told me that the workspace name (which was nonblank) had to be nonblank. So I tried “test2” as a name. Same effect. Not sure what is going on here, because I followed the instructions in the documentation.