SUBSEA  Check to see whether you’ve disabled any of the Reader plug-ins within the Adobe Reader Info pane you get when you press Command-i. I had disabled the Updater.acroplugin and was got the same error message until I re-enabled it.  
(Version 9.2)

SUBSEA  Downloads .zip file labeled V5.0.3. Opens with disk image of V5.0.2 which still won’t run, needing more resources.  
(Version 5.0.3)

SUBSEA  Still doesn’t work through a corporate firewall requiring password authentication. Error message says it can’t find a network connection. Works fine with a direct connection to the web.  
(Version 1.5)

SUBSEA  Doesn’t seem to work through a proxy server. Gives message: “error, there is no network connection available.” Other widgets don’t have this problem.  
(Version 1.2)