Fatal error: Uncaught Error: Call to undefined function add_action() in /home/refref/public_html/codemirror/wp-post-to-pdf-enhanced-cache/knowhow/framework/template-navigation.php:302 Stack trace: #0 {main} thrown in /home/refref/public_html/codemirror/wp-post-to-pdf-enhanced-cache/knowhow/framework/template-navigation.php on line 302