I just updated my iPhone app and the majority of my cameras still have a red X. It seems to have gotten worse, not every 932L that is on there (5) all have the X, the only one actually working is my 2330L, so this may be a camera update issue.
Like I said originally though, these cameras are still working, I get email notifications from then and I can view them in my DVR app, its just the Dlink Lite app that isn't showing them working. Ill also add I've had all these cameras setup the exact same for years