Confuse How to Make The Plugin Works

I tested it but it doesn’t work as I hope for.

For the container to load the result, I add <div id="main"> in my index.php.

<div id="main">
        <?php
		if ( have_posts() ) :
			while ( have_posts() ) :
				the_post();
				get_template_part( 'post-templates/content' );
				endwhile;
		else :
			get_template_part( 'post-templates/content', 'no-articles' );
		endif;
		?>
</div>

1. Menu. When I clicked my nav menu, it showed up the whole site cramped into the container.
2. Pagination. If I clicked my pagination, It didn’t work very well. It loaded for the first time, then not the next time.
3. Lazy Load. My lazy load didn’t work either after I clicked the pagination. So the picture of my post list just disappeared.

What should I do?
my site: https://www.dapur-uang.com

https://www.ads-software.com/plugins/ajaxify-wordpress-site/