Can't search to link to existing content

Hi,

Since I updated to 4.2.1 I can’t add links from within my site (https://www.brazenwoman.com). I can highlight the desired text to link, click the link button and have the box come up as usual. But when I type a search term in the box, nothing happens. Before, a selection of posts would come up. Now, it just says “No search term specified. Showing recent items.” I’ve updated all my plugins, and I’ve tried it on two browsers and two computers. We did a test and it’s wordpress not making the query. I have another site that hasn’t been updated yet today and it works fine.