There was an error and nobody defined a custom 404 page message, so you're seeing this instead.
//php if (! is_page_template( 'page-top-level.php' ) ) { ?>
//php $contact_no = preg_replace('/[^0-9.]+/', '', get_field('contact_no', 'options')); ?>
//php if ( is_active_sidebar( 'footer_1' ) ) : ?>
//php dynamic_sidebar( 'footer_1' ); ?>
//php endif; ?>
//php } ?>