GTA V companion app iFruit having issues, Rockstar working on a fix
Phone). Or, on your own iOS device (since the Android and WP apps aren't out yet), you may have been having troubles logging in to the iFruit companion app.If you've been playing GTA V, you may have run into errors after taking pictures with your smartphone in the game (with Franklin's pseudo-Galaxy S III, Michael's pseudo-iPhone, or Trevor's pseudo-Windows
Rockstar has acknowledged the issues, and has already implemented some fixes for the problems, but it is still working on a full fix for the iFruit login errors that users have been experiencing. No word on when to expect those fixes so you can get back to training Chop.
source: Rockstar Support