Google+ Photos in Gallery greyed out unable to load photo. How can I fix this?

[AC Question]

Google+ Photos in Gallery greyed out "unable to load photo."

Recently, most (not all) of my Google+ photos/albums don't display on my Galaxy s4 anymore. I'm able to view the photos fine on Google+. The sync settings haven't changed. Any ideas? Thanks.

 

[B. Diddy]

Re: Google+ Photos in Gallery greyed out "unable to load photo."

Duplicate, see response here: http://forums.androidcentral.com/ask-question/534048-gallery-unable-load-photo.html. Thread closed to avoid parallel discussions.