Iveth,
We should be able to get an update out over the next few days, but in the meantime, you can test what our fix will be. Please disable Error Reporting in the Joomla Global Configuration. We think that a PHP warning can be inserted by our System plugin. These warnings can cause some issues with AJAX requests or other operations. If you disable Error Reporting, it will prevent warnings, notices, and errors from displaying, and should fix your problem.
We'll have an update out in a bit that will prevent any warnings from being generated, but hopefully, turning off errors on your site will work for you now, and also let us know that our fix will be the required solution.
To disable error reporting, if you're not aware, see the post below, and set the option to "None":
www.sourcecoast.com/extensions/troublesh...ng-joomla-extensions
Thanks, and please let us know how it goes!