Merch theme single post broken

Hi,
I'm working on removing Elementor from my website and switching to the Merch layout on a staging site.

The trouble I'm having is with the single post.

The element that shows the post title, excerpt and meta above the featured image is, instead, showing this above the featured image on the front of the site:

term_id ) ) . '" alt="' . esc_attr( sprintf( __( 'View all posts in %s', 'textdomain' ), $category->name ) ) . '">' . esc_html( $category->name ) . '' . $separator; } echo trim( $output, $separator ); } the_title( '
', '
' ); if ( has_excerpt() ) : // Only show custom excerpts not autoexcerpts ?>

and in the related posts section this shows on the front:

slug; $list = get_page_by_title( 'related', 'OBJECT', 'wp_show_posts' ); if ( function_exists( 'wpsp_display' ) && is_object( $list ) ) { wpsp_display( $list->ID, 'tax_term="' . $cat_slug . '"' ); } ?>

This is what I have in my Single Post Entry Header element:

<div id="custom-post-entry-header" class="custom-post-header grid-container">		
	<?php
	$categories = get_the_category();
	$separator = ' | ';
	$output = '';
	
	if ( ! empty( $categories ) ) {
		foreach( $categories as $category ) {
			$output .= '<a href="' . esc_url( get_category_link( $category->term_id ) ) . '" alt="' . esc_attr( sprintf( __( 'View all posts in %s', 'textdomain' ), $category->name ) ) . '">' . esc_html( $category->name ) . '</a>' . $separator;
		}
		
		echo trim( $output, $separator );
	}
	
	the_title( '<h1 class="entry-title" itemprop="headline">', '</h1>' );

	if ( has_excerpt() ) : // Only show custom excerpts not autoexcerpts ?>
		<p class="entry-subtitle"><?php echo get_the_excerpt(); ?></p>
	<?php endif; ?>
</div>

I've been trying to problem-solve what's broken here -- everything else seems fine; it's just the single post that I'm having issues with.

Thanks!
Cheryl