Woocommerce Cart not adding items for customer

hi there
your website facing some errors

Fatal error: Call to undefined function is_checkout() in /*/*/*/*/plugins/gift-cards-for-woocommerce/includes/scripts.php on line 67

fix it and I`ll try to help you out with the add to cart part

Thanks, I have now deleted that plugin

I also deactivated each plugin one by one to see if one of the plugins was the issue. Very odd that everything works as normal except for add to cart on the front end. Like I said it adds to the cart fine on the back end. Then I logout of wordpress and try to add to cart and it fails.

• This reply was modified 6 years, 10 months ago by kwiltkrazy.

first
go to /wp-content/plugins/woocommerce/templates/single-product/add-to-cart
via ftp.
and rename variation-add-to-cart-button.php to variation-add-to-cart-button1.php
this step just a back up file “just in case.

and make a new .php file and name it variation-add-to-cart-button.php
and add the next code in it

<?php
/**
 * Single variation cart button
 *
 * @see 	https://docs.woocommerce.com/document/template-structure/
 * @author  WooThemes
 * @package WooCommerce/Templates
 * @version 3.0.0
 */
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

global $product;
?>
<div class="woocommerce-variation-add-to-cart variations_button">
	<?php
		/**
		 * @since 3.0.0.
		 */
		do_action( 'woocommerce_before_add_to_cart_quantity' );

		woocommerce_quantity_input( array(
			'min_value'   => apply_filters( 'woocommerce_quantity_input_min', $product->get_min_purchase_quantity(), $product ),
			'max_value'   => apply_filters( 'woocommerce_quantity_input_max', $product->get_max_purchase_quantity(), $product ),
			'input_value' => isset( $_POST['quantity'] ) ? wc_stock_amount( $_POST['quantity'] ) : $product->get_min_purchase_quantity(),
		) );

		/**
		 * @since 3.0.0.
		 */
		do_action( 'woocommerce_after_add_to_cart_quantity' );
	?>
	<button type="submit" class="single_add_to_cart_button button alt"><?php echo esc_html( $product->single_add_to_cart_text() ); ?></button>
	<input type="hidden" name="add-to-cart" value="<?php echo absint( $product->get_id() ); ?>" />
	<input type="hidden" name="product_id" value="<?php echo absint( $product->get_id() ); ?>" />
	<input type="hidden" name="variation_id" class="variation_id" value="0" />
</div>

and let me know if something change.

seems all good