Fatal error: Uncaught Error: Call to undefined function add_action() in /home/glennroe/public_html/intertextual-hub/wp-content/themes/omega/lib/extensions/custom-css.php:4 Stack trace: #0 {main} thrown in /home/glennroe/public_html/intertextual-hub/wp-content/themes/omega/lib/extensions/custom-css.php on line 4