Hi,

can anyone help me? When I try to turn on standart joomla cache, and when I try to open seblod page, I see blank page with an error and site stops working:

Fatal error: main(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "JCategoryNode" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition in /www/site name/modules/mod_articles_categories/mod_articles_categories.php on line 29

these are lines from 26 to 31

if (!empty($list))
{
	$moduleclass_sfx = htmlspecialchars($params->get('moduleclass_sfx'));
	$startLevel = reset($list)->getParent()->level;
	require JModuleHelper::getLayoutPath('mod_articles_categories', $params->get('layout', 'default'));
}

what can I do to make cache function work?

Thanks in advance...