I'm using a child theme of twenty eleven, just went to add a new page to the menu. The page shows up in the list on the left but when I click it and click the "Add to Menu" button, it just sits there with the "spinning wheel" and does not add it to the menu. I've never come across this before.
This website has been operational for a year, never had a problem like this before. The only thing I've done recently is updated the version of jQuery it was running (in an effort to get another plugin to work).
Any suggestions? Do I have to downgrade jQuery? Ugh.