Adding Ajax Load More to archive.php

Hi there,

I’m trying to add the plugin Ajax Load More to the archive page, but I’m not sure how to do it.
I’m tweaking the child theme. I copied the archive.php from the main theme and modified following this example:
https://connekthq.com/plugins/ajax-load-more/docs/code-samples/category-archives/

I added the code here:

<?php
		teletype_pagination();

	else :
		get_template_part( 'template-parts/content', 'none' );
		
   $cat = get_query_var('cat');
   $category = get_category ($cat);
   echo '<h1>'.$category->cat_name.'</h1>';
   echo do_shortcode('[ajax_load_more category="'.$category->slug.'" cache="true" cache_id="cache-'.$category->slug.'"]');
		
	endif; ?>

	</section><!-- #blog -->

	</main><!-- #main -->
</div><!-- #primary -->

<?php
get_footer();

But is not working.
Any hints?