Make ajax uris absolute

web/typo3conf/ext/ep_theme/Classes/ViewHelpers/Uri/AjaxViewHelper.php

@@ -69,6 +69,8 @@ class AjaxViewHelper extends ActionViewHelper
             $arguments['pageUid'] = $rootPage['uid'];
         }
 
+        $arguments['absolute'] = true;
+
         return parent::renderStatic($arguments, $renderChildrenClosure, $renderingContext);
     }