Fatal error: Uncaught Error: Call to undefined function add_action() in /home/bestbuil/public_html/wp-content/themes/bestbuilt/plugins/gutenberg-styles/gutenberg-styles.php:18 Stack trace: #0 {main} thrown in /home/bestbuil/public_html/wp-content/themes/bestbuilt/plugins/gutenberg-styles/gutenberg-styles.php on line 18