Pinterest issue: site doesn’t allow readers to pin content

[ Moved to the Fixing WordPress sub-forum. ]

My site is suddenly blocking readers from being able to pin my content on Pinterest. When I try to pin my content, I get the error message, “Sorry, this site doesn’t allow you to save pins.” I did not change any settings. Because this occurred right after the recent WordPress update to 4.7.4, I wonder if this might have had something to do with it.

I have tried pinning via the share buttons on my site and by manually pasting the URL into Pinterest. I have tried multiple browsers, clearing caches, and logging out of my site first. Same result.

Pinterest is the largest driver of traffic to my site, so I would appreciate any help in getting this resolved quickly. My site is www.flippedoutfood.com.

Thank you,

Michelle