Fatal error: Uncaught Error: Call to undefined method WooCommerce::add_error() in /home/www/antone2020/wp-content/plugins/woocommerce-product-addons/product-addons.php:787 Stack trace: #0 /home/www/antone2020/wp-includes/class-wp-hook.php(324): woocommerce_product_addons->validate_add_cart_item(false, 4204, 1) #1 /home/www/antone2020/wp-includes/plugin.php(205): WP_Hook->apply_filters(true, Array) #2 /home/www/antone2020/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(804): apply_filters('woocommerce_add...', true, 4204, 1) #3 /home/www/antone2020/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(778): WC_Form_Handler::add_to_cart_handler_simple(4204) #4 /home/www/antone2020/wp-includes/class-wp-hook.php(324): WC_Form_Handler::add_to_cart_action('') #5 /home/www/antone2020/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #6 /home/www/antone2020/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #7 /home/www/antone2020/wp-settings.php(665): do_action('wp_loaded') in /home/www/antone2020/wp-content/plugins/woocommerce-product-addons/product-addons.php on line 787
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