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Composite Products - error on WooCommerce Cart page

With some installation could happen that the cart page display this error:

YITH_WCP_Cart::cart_item_quantity() in /home/antaly5/public_html/shop/wp-content/plugins/yith-composite-products-for-woocommerce-premium/includes/class.yith-wcp-cart.php on line 564

the issue is related to theme that overwrite the WooCommerce template cart.php, in the file:


is caused by the filter "woocommerce_cart_item_quantity" that in some themes missed the third argument:

echo apply_filters( 'woocommerce_cart_item_quantity', $product_quantity, $cart_item_key );

below the right code:

echo apply_filters( 'woocommerce_cart_item_quantity', $product_quantity, $cart_item_key, $cart_item );

changing the code like above will fix the issue and the error disappear.

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