Open Data public site won't open

[TomCasady]

I have a PUBLIC open data site that will not open. If I mark it PRIVATE on the Manage Sites page in our organization, it opens fine. This has just started happening in the last day. All the sites in our organization behave the same way: select PUBLIC, they won't open; go back to PRIVATE they will. 

[MatthewMayfield]

Reset to public and emailed you, Graham. Thanks!