Error [500]

Class "JArrayHelper" not found
.../plugins/osmap/com_easyblog/com_easyblog.php:83
78 
79         $node->modified = isset($node->modified) ? $node->modified  : time();
80 
81         parse_str(html_entity_decode($link_query['query']), $linkVars);
82 
83         $view = JArrayHelper::getValue($linkVars, 'view', '');
84         $layout = JArrayHelper::getValue($linkVars, 'layout', '');
85         $id = JArrayHelper::getValue($linkVars, 'id', 0);
86 
87 		switch ($view) {
88 			case 'blogger':