Ajax Load not working. Loads Html no posts

I have added the following shortcode to index.php:

<?php echo do_shortcode('[ajax_load_more]');
?>

This should load the posts however only loads:
<section id="ajax-load-more" class=" default"><div class="alm-listing archive" data-repeater="default" data-post-type="post" data-category="" data-taxonomy="" data-tag="" data-author="" data-exclude="" data-offset="0" data-posts-per-page="5" data-search="" data-scroll="true" data-max-pages="5" data-pause="false" data-button-label="Older Posts" data-transition="slide"></div></section>

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No actual posts are loaded

https://ww.wp.xz.cn/plugins/ajax-load-more/