What is the full path of that URL? It looks like your browser did not understand that it was supposed to save a file and just opened it instead.
Also, firefox is not a supported browser, not sure if that's what you're using, but try chrome or IE instead.
I am using IE 11.
This is the path that gets generated by the admin-Console
Try the save command under the file menu. IE doesn't know how to download a .settings file so it's just showing you the file on the screen.
File > Save/save as, save your fms13_settings.settings file, then you can return to the admin console.
Thanks Mike. It did not work
But it does work locally? Did your IP address of the server get changed somehow?