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El Capitan upgerade wont allow sync photos to your iphone?

Since I have upgraded to El Capitan and I try to sync "Photos" with either my iPad or iPhone 6 plus using my USB cable I get the message "iTunes cannot sync the photos to the iPad "XXX's iPad" because your Photos library is not yet available. Please try again later"

I can view all my photos in this App on my computer, but am just unable to Sync. I do not want to use ICloud.