WordPress Taxonomy get category

[admin]

Hopefully an easy fix for someone!

I have a custom post type, named 'products'.

Using this code, I am getting the name of each 'product':

    <?php 

//Define your custom post type name in the arguments

$args = array('post_type' => 'products');

//Define the loop based on arguments

$loop = new WP_Query( $args );

//Display the contents

while ( $loop->have_posts() ) : $loop->the_post();
?>
<h1 class="entry-title"><?php the_title(); ?></h1>




<?php endwhile;?>

Each of these products is inside a category. What I want to do is get not only the_title, but get the category.

I tried using

<?php the_category(); ?>

but no luck.

Anyone got any clue?

EDIT:

Sorry, I have these created inside my products custom post type.

    add_action( 'init', 'create_product_cat_external' );

function create_product_cat_external() {
    register_taxonomy(
        'ExternalProducts',
        'products',
        array(
            'label' => __( 'External Products' ),
            'rewrite' => array( 'slug' => 'externalproducts' ),
            'hierarchical' => true,
        )
    );
}
add_action( 'init', 'create_product_cat_internal' );

function create_product_cat_internal() {
    register_taxonomy(
        'InternalProducts',
        'products',
        array(
            'label' => __( 'Internal Products' ),
            'rewrite' => array( 'slug' => 'internalproducts' ),
            'hierarchical' => true,
        )
    );
}

which give me external and internal products as categories. But inside these, I have categories which have been made on the wordpress backend.

This is how it looks when I select a product:

<img src="

https://imgur.com/ynpqU

" alt="backend">