To add the js.

Add a text block to the page above the post grid. The code you need to paste (copy it from the forum thread, and NOT from the email) into this text block is:

<script>(function ( $ ) {
	"use strict";
	
	// detects when the ajax request has finished and the content has been updated
	// re-init the layout scripts from Elementor
	$(document).on("sf:ajaxfinish", ".searchandfilter", function(){
		elementorFrontend.hooks.doAction('frontend/element_ready/posts.classic', jQuery('.elementor-widget-posts'));
	});
	
}(jQuery));</script>