I think line 430 should be:
throws new PHPDS_exception(sprintf(___('File could not be found after trying to execute filename : %s'), $navigation[$menu_id]['menu_link']));
I think line 430 should be:
throws new PHPDS_exception (sprintf( ___('File could not be found after trying to execute filename : %s'), $navigation[ $menu_id] ['menu_ link']) );