Clean, do you have a message in game when you can't connect? I had a message with a "cannot connect to server" code (which I can't remember). Either way it referred me to my notifications which said something to the effect of "file could not be uploaded...etc. I deleted said notification, and went back to the home screen. With GTS highlighted, pressed the options button on the DS4, selected check for updates and BOOM! Back online again! Hope this helps.