Internal link type not working

@Mike Kadow and I are both having this issue.

When editing a post and trying to insert a link, I use the Internal link type to link to a different post.  I am able to search for the page and get the page name to show up in the dialog box, but then the "ok" button is non-responsive.  I can cancel properly.  If I change the link type to URL and paste in the full URL of the page, I can click "ok" and it will save the link.

I have tested this by trying to edit an existing link that is Internal, and while the dialog opens and shows the proper page in the internal link, the "ok" button is non-responsive.

This is happening for me in Chrome on Win10.