Thanks for finding this. Line 434 at meta-boxes.php has a syntax error. It should use ‘.’ operator for strings concatenation instead of ‘+’. So valid code will be:
return array('result'=>'success', 'message'=>'Widgets permissions for '. $ure_object_name, 'html'=>$html);
I will include this fix into the next version 4.47.3. Let me know the result of your testing with updated version of this file.
