Fatal error: Uncaught Error: Call to undefined function RankMath\OpenGraph\is_product() in /var/www/forlagetegolibris.dk/public_html/wp-content/plugins/seo-by-rank-math/includes/opengraph/class-facebook.php:347 Stack trace: #0 /var/www/forlagetegolibris.dk/public_html/wp-content/plugins/seo-by-rank-math/includes/opengraph/class-facebook.php(171): RankMath\OpenGraph\Facebook->is_product() #1 /var/www/forlagetegolibris.dk/public_html/wp-content/plugins/seo-by-rank-math/includes/opengraph/class-facebook.php(132): RankMath\OpenGraph\Facebook->get_type() #2 /var/www/forlagetegolibris.dk/public_html/wp-includes/class-wp-hook.php(292): RankMath\OpenGraph\Facebook->type(Object(RankMath\OpenGraph\Facebook)) #3 /var/www/forlagetegolibris.dk/public_html/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters('da_DK', Array) #4 /var/www/forlagetegolibris.dk/public_html/wp-includes/plugin.php(551): WP_Hook->do_action(Array) #5 /var/www/forlagetegolibris.dk/public_html/wp-content/plugins/seo-by-rank-math/includes/traits/class-hooker in /var/www/forlagetegolibris.dk/public_html/wp-content/plugins/seo-by-rank-math/includes/opengraph/class-facebook.php on line 347