Woocommerce add to cart message not showing - wordpress

Question

After implementing and doing design changes locally on a project, the woocommerce messages are not showing anymore on the single product page. I don't get any console errors, so I don't think it has anything to do with that. And the request is processed since when I go to see the cart from another page, then the item that I was trying to add is on the list, it is just that the message doesn't show on a singe product page. I am not sure where to go about?
This is the add-to-cart/variable file:
<?php
/**
* Variable product add to cart
*
* #author WooThemes
* #package WooCommerce/Templates
* #version 2.4.0
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
global $product;
$attribute_keys = array_keys( $attributes );
do_action( 'woocommerce_before_add_to_cart_form' ); ?>
<form class="variations_form cart" method="post" enctype='multipart/form-data' data-product_id="<?php echo absint( $product->id ); ?>" data-product_variations="<?php echo esc_attr( json_encode( $available_variations ) ) ?>">
<?php do_action( 'woocommerce_before_variations_form' ); ?>
<?php if ( empty( $available_variations ) && false !== $available_variations ) : ?>
<p class="stock out-of-stock"><?php _e( 'This product is currently out of stock and unavailable.', 'woocommerce' ); ?></p>
<?php else : ?>
<div class="variations" cellspacing="0">
<?php foreach ( $attributes as $attribute_name => $options ) : ?>
<div class="row">
<div class="small-3 columns">
<label for="<?php echo sanitize_title( $attribute_name ); ?>" class="text-left middle">
<strong><?php echo wc_attribute_label( $attribute_name ); ?></strong>
</label>
</div>
<div class="small-9 columns">
<?php
$selected = isset( $_REQUEST[ 'attribute_' . sanitize_title( $attribute_name ) ] ) ? wc_clean( $_REQUEST[ 'attribute_' . sanitize_title( $attribute_name ) ] ) : $product->get_variation_default_attribute( $attribute_name );
wc_dropdown_variation_attribute_options( array( 'options' => $options, 'attribute' => $attribute_name, 'product' => $product, 'selected' => $selected ) );
echo end( $attribute_keys ) === $attribute_name ? '<a class="reset_variations" href="#">' . __( 'Clear selection', 'woocommerce' ) . '</a>' : '';
?>
</div>
</div>
<?php endforeach;?>
</div>
<?php do_action( 'woocommerce_before_add_to_cart_button' ); ?>
<div class="row single_variation_wrap" style="display:none;">
<div class="small-9 small-offset-3 columns">
<?php
/**
* woocommerce_before_single_variation Hook
*/
do_action( 'woocommerce_before_single_variation' );
/**
* woocommerce_single_variation hook. Used to output the cart button and placeholder for variation data.
* #since 2.4.0
* #hooked woocommerce_single_variation - 10 Empty div for variation data.
* #hooked woocommerce_single_variation_add_to_cart_button - 20 Qty and cart button.
*/
do_action( 'woocommerce_single_variation' );
/**
* woocommerce_after_single_variation Hook
*/
do_action( 'woocommerce_after_single_variation' );
?>
</div>
</div>
<?php do_action( 'woocommerce_after_add_to_cart_button' ); ?>
<?php endif; ?>
<?php do_action( 'woocommerce_after_variations_form' ); ?>
</form>
<?php do_action( 'woocommerce_after_add_to_cart_form' ); ?>

Answer 1

This looks like quite an old version of the variable.php template, if you have anything higher than WooCommerce 2.4.0 installed (i checked against the 2.5.0 version of this template) there are enough significant changes that might break certain parts of WooCommerce.
One difference that immediately stood out to me was that the data-product_variations attribute on the form in later versions uses htmlspecialchars instead of esc_attr.
Hope this helps!