Fatal error: Uncaught Error: Call to undefined function add_action() in /home/preserco/public_html/demos/grupoGBE/wp-content/plugins/astra-addon/addons/sticky-header/classes/class-astra-ext-sticky-header-markup.php:42 Stack trace: #0 /home/preserco/public_html/demos/grupoGBE/wp-content/plugins/astra-addon/addons/sticky-header/classes/class-astra-ext-sticky-header-markup.php(32): Astra_Ext_Sticky_Header_Markup->__construct() #1 /home/preserco/public_html/demos/grupoGBE/wp-content/plugins/astra-addon/addons/sticky-header/classes/class-astra-ext-sticky-header-markup.php(798): Astra_Ext_Sticky_Header_Markup::get_instance() #2 {main} thrown in /home/preserco/public_html/demos/grupoGBE/wp-content/plugins/astra-addon/addons/sticky-header/classes/class-astra-ext-sticky-header-markup.php on line 42