Listing Template – Page content widget issue

I have edited the listing page template but now getting an error when previewing the actual listing. Simply using the page content widget in elementor

Warning: count(): Parameter must be an array or an object that implements Countable in /app/public/wp-includes/post-template.php on line 293

Cannot submit a support ticket as the email address I previously used is not longer active and can’t see anywhere to change / contact you directly.