iTunes cannot sync photos to the iPhone “iPhone” because your iPhoto Library is not yet available. Please try again later.

Ive been trying to sync my phone and it shows this:

iTunes cannot sync photos to the iPhone “iPhone” because your iPhoto Library is not yet available. Please try again later..............

When i connect my phone iPhotos comes up and shows my photos and i even tried syncing my photos to my laptop and even deleting them and this message keeps popping up. it just backs up then says downloading photos on iTunes then that error message comes out.