Fatal error: Uncaught Error: Call to undefined function is_product() in /www/htdocs/w007b71d/02Sites/weinfein/wordpress/wp-content/plugins/download-now-for-woocommerce/woo-files/somdn-woo-functions.php:141 Stack trace: #0 /www/htdocs/w007b71d/02Sites/weinfein/wordpress/wp-includes/class-wp-hook.php(286): somdn_is_single_product_woo(false) #1 /www/htdocs/w007b71d/02Sites/weinfein/wordpress/wp-includes/plugin.php(203): WP_Hook->apply_filters(false, Array) #2 /www/htdocs/w007b71d/02Sites/weinfein/wordpress/wp-content/plugins/download-now-for-woocommerce/includes/somdn-functions.php(95): apply_filters('somdn_is_single...', false) #3 /www/htdocs/w007b71d/02Sites/weinfein/wordpress/wp-content/plugins/download-now-for-woocommerce/woo-files/somdn-woo-compatibility.php(457): somdn_is_single_product() #4 /www/htdocs/w007b71d/02Sites/weinfein/wordpress/wp-includes/class-wp-hook.php(286): somdn_purchasable_compat_head('') #5 /www/htdocs/w007b71d/02Sites/weinfein/wordpress/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NUL in /www/htdocs/w007b71d/02Sites/weinfein/wordpress/wp-content/plugins/download-now-for-woocommerce/woo-files/somdn-woo-functions.php on line 141