Fatal error: Call to a member function main() on a non-object

Hi,
By using this plugin, when I click on the pointer icon (pointer.png), for example to create instances, opens a popup window with the following error:

Fatal error: Call to a member function main() on a non-object in /home/???/public_html/wp-includes/functions.php on line 808

This happens in any such option click this icon.

I leave an extract of my functions.php on these lines.

function avada_cat_count_span($links) {
	$get_count = preg_match_all('#\((.*?)\)#', $links, $matches);

	if($matches) {
		$i = 0;
		foreach($matches[0] as $val) {
			$links = str_replace('</a> '.$val, ' '.$val.'</a>', $links);
			$links = str_replace('</a>&nbsp;'.$val, ' '.$val.'</a>', $links);
			$i++;
		}
	}

	return $links;
}

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