Cart content dissappear with a function

Hi
I added this function to the functions.php file because I want to show “Continue shopping” button on cart:

add_action('woocommerce_cart_coupon', 'themeprefix_back_to_store');
function themeprefix_back_to_store() { ?>
<a class="button wc-backward" href="<?php echo get_permalink( wc_get_page_id( 'shop' ) ); ?>"><?php _e( 'Seguir comprando', 'woocommerce' ) ?></a>
<?php
}

But it makes that the div “.widget_shopping_cart_content” load empty, and the cart tab only shows the background color.
If I rename the functions.php file, vart tab works fine.
I need the both options in the site. how can I solve the conflit?

Thanks for the help and the plugin, is great!

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