You need to authorize your computer before you can play these songs.After you authorize, choose File Update i Cloud Music Library from the menu bar at the top of your computer screen or the top of the i Tunes window.and that is no longer the case for i OS 9 or most of the earlier builds of i OS 10.
Before following any of the steps in this article, make sure that your i Cloud Music Library is set up correctly and that you have the latest versions of i OS, mac OS, and i Tunes.
This isn't such a big problem these days thanks to the huge storage capacities of some i Phones, but if you've got an older phone or one with 32 GB or less of storage, you may encounter it.
One very easy way to get around this problem is not to update wirelessly. Sure, it's fast and easy to install the update wirelessly, but if you also sync your i Phone to a computer, try that approach and your problem will be solved.
It's also a good idea to search Apple's Support Page for your specific i Photo symptom before doing a rebuild, just in case there is a more specific article or relevant solution.
The release of a new version of the i OS is exciting—new features, new emoji, bug fixes!