Migrating and Upgrading to Joomla! 4.x • Re: Return value of Joomla\Component\Templates\Administrator\Model\StyleModel::getAdminTemplate() must be an instance of

Code:

  */      public static function get_active_template()      {          $app = JFactory::getApplication('administrator');           if ($app->isClient('administrator'))    {$styleid  = JRequest::getInt('id');  <= HERE$db       = JFactory::getDBO();$query    = 'SELECT template'. ' FROM #__template_styles'. ' WHERE id='.(int)$styleid;$db->setQuery($query);