Finally resolve the same problem after hours of digging. The solution was not mine. Hope this helps.
For some reason my theme needs to load the add-to-cart-variation.js
I copied the file from woocommerce directory to the /js directory for the theme.
And add the following to functions.php
function mv_my_theme_scripts()
{
wp_enqueue_script(‘add-to-cart-variation’, get_template_directory_uri() . ‘/js/add-to-cart-variation.js’,array(‘jquery’),’1.0′,true);
}
add_action(‘wp_enqueue_scripts’,’mv_my_theme_scripts’);
?>
