Fix class loading bug #20

Author: brendanheywood

classes/local/hook/output/before_standard_head_html_generation.php

@@ -34,6 +34,8 @@ class before_standard_head_html_generation {
     public static function callback(\core\hook\output\before_standard_head_html_generation $hook): void {
         GLOBAL $PAGE;
 
+        require_once(__DIR__ . '/../../../../lib.php');
+
         // If URL should not be indexed, add the noindex meta tag to page.
         if (tool_seo_is_url_indexable($PAGE->url->get_path()) == false) {
             $hook->add_html('<meta name="robots" content="noindex, nofollow" />');