Disappeared Users and Groups after updating to XWiki 10.11.10

After updating to XWiki 10.11.10 all Users an Groups are disappeared.
The totals are made, but the Users and Groups are not shown.

Try to clear your browser’s cache and reload the page.

Nope. Did not work.

Then you should check the JavaScript console for JavaScript exceptions and also the Network tab for the HTTP request that gets the users / groups, using the browser’s developer tools.

I did and the following was visible:
I searched XWiki Extensions for something with Lightbox and found Lightbox Macro, but not for XWiki 10.11.10

lightbox.js is not used anymore. The error shows that your pages (the Administration application at least) have not been properly upgraded (they have old code that doesn’t work with the new version of the XWiki WAR). Did you run the Distribution Wizard after upgrading the WAR? Did you encounter merge conflicts (especially on the Administration application)? You can also check the version of the Administration application that you have installed. And you can also compute the difference between your local pages and the standard Administration application pages using https://extensions.xwiki.org/xwiki/bin/view/Extension/Extension+Manager+Application#HChanges .