hi
Today the message is sent from a website to email me at any minute show:

PHP Fatal error:  Call to a member function hasDecorator() on a non-object in /home/....../domains/parspatogh.com/public_html/ow_core/theme_manager.php on line 186
Fatal error: Call to a member function hasDecorator() on a non-object in /home/....../domains/parspatogh.com/public_html/ow_core/theme_manager.php on line 186

Line 186 is the code:

if ( $this->currentTheme->hasDecorator($decoratorName) )
 {
 
          return $this->currentTheme->getDecorator($decoratorName);
   }

How can I solve this problem?