fatal error help GSC

purposebelles.com I have a plugin that keeps giving me errors but I do not want to part with it so I need help fixing this issue. The plugin: Genesis Super Customizer My error: Fatal error: Call to undefined function genesis_get_option() in /home/lightplu/public_html/wp-content/plugins/genesis-super-customizer/public/class-gsc-public.php on line 64 Which is this: public function enqueue_scripts() { if( genesis_get_option( ‘fixed_header’, ‘genesis-customizer-settings’ ) ){ wp_enqueue_script( ‘gsc-add-bumper’, plugin_dir_url( __FILE__ ) . ‘js/gsc-add-bumper.js’, array( ‘jquery’ ), $this->version ); wp_enqueue_script( ‘gsc-shrink-header’, plugin_dir_url( __FILE__ ) . ‘js/gsc-shrink-header.js’, array( ‘jquery’ ), $this->version ); } } https://wordpress.org/plugins/genesis-super-customizer/