Fatal error: Uncaught Error: Call to undefined function add_action() in /home/kacperg/public_html/kacpergr/wp-content/plugins/shapely-companion/inc/shapely-metabox.php:6 Stack trace: #0 {main} thrown in /home/kacperg/public_html/kacpergr/wp-content/plugins/shapely-companion/inc/shapely-metabox.php on line 6