The root site in our WordPress network has 271 pages. The network has 8 sites and around 1,500 pages total. We have a dozen administrators and perhaps 20 editors.
While preparing for a network launch last night, I was looking through the pages list and received this message in the yellow update bar at the top: "Thank you for Updating! Please visit the Update Network page to update all your sites."
There is no way we could have updated, because the site has been running the latest WP version all along, and obviously, there was no new version released last night.
After seeing this message, I immediately discovered none of my pages were displaying on the front of the root site. As far as I can tell, all pages still contain the complete and correct data within the editor - nothing has changed with the data - but the pages will not display on the site.
We have a lot of experience with WordPress and have worked through all the logical troubleshooting steps, but have been unable to find a potential cause. Any ideas?