Custom single-event.php breaking page

Hello Tribal Dancer,
I made a custom single-event.php that is working well with a twentyfifteen child theme. I share my code with you maybe it can helps. If you want, you can share me your code and I can test it on my mamp environment :

<?php
/**
 * The template for displaying single events in https://lupita.artandfield.org
 *
 * 
 */
 
//Call the template header
get_header(); ?>

<div id="primary" class="content-area">

    <main id="main" class="site-main" role="main">
    
        <div id="lupita-content">

        <header>
            <?php while ( have_posts() ) : the_post(); ?>
            
            <!-- Display event title -->
            <h1><?php the_title(); ?></h1>
            
            <div id="lupita-entry-meta">
			 <?php
			 //Events have their own 'event-category' taxonomy. Get list of categories this event is in.
			$categories_list = get_the_term_list( get_the_ID(), 'event-category', '', ', ','' );

			if ( '' != $categories_list ) {
				$utility_text = __( 'Categorias: %1$s.</br> Texto publicado por <a href="%3$s">%2$s</a>.', 'eventorganiser' );
			} else {
				$utility_text = __( 'Texto publicado por <a href="%3$s">%2$s</a>.', 'eventorganiser' );
			}
			printf($utility_text,
				$categories_list,
				get_the_author(),
				esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) )
			);
			?>

			<?php edit_post_link( __( 'Edit' ), '<span class="edit-link">', '</span>' ); ?>
        </div><!-- .entry-meta -->

        </header><!-- #lupita-content header -->
        
        <div id="lupita-left-column">
			<div id="event-image">
                <?php
                // Post thumbnail.
                the_post_thumbnail('full'); 
                echo "<div class='event-caption-text'>";
                echo get_post(get_post_thumbnail_id())->post_excerpt;
                echo "</div>";
                ?>
            </div><!-- .post-thumbnail -->	
            
            <!-- The content or the description of the event-->
				<?php the_content(); ?>
            
        </div><!-- closing left column -->
    
        <div id="lupita-right-column">         

            <div class="eventorganiser-event-meta">

            <!-- Event details -->
            <div id="event-details">
	
                <h2><?php _e('Informaciones prácticas') ;?></h2>
                <ul>
                <!-- The first element of the list is start and end dates of the event -->
                <li><strong><?php _e('Fechas: ') ;?></strong><?php eo_the_start('j F Y'); ?> <?php _e(' - ') ;?><?php eo_the_end('j F Y'); ?></li>

                <!-- The second element on the list is the venue -->
                <?php if( eo_get_venue() ){
                echo '<li>';
                echo '<strong>'; 
				echo "Lugar: "; 
				echo '</strong>';
				echo '<span><a href="';
                echo eo_venue_link();
                echo '">';
                echo eo_venue_name();
                echo '</a></span></br>';
				$address_details = eo_get_venue_address();
				echo '<i>'; 
				echo "Dirección: "; 
				echo '</i>';
				echo $address_details['address'];
				echo ", ";
				echo $address_details['postcode']; 
				echo " ";
				echo $address_details['city'];
				echo ", "; 
				echo $address_details['country'];
				echo ".";
				echo '</li>';
  	             ?>
                    </ul>
            </div><!-- #event-details-->

<!-- Display a map of the venue -->
            <div id="lupita-event-map">
                <?php echo eo_get_venue_map(eo_get_venue(),array('width'=>'100%', 'height' => '300px') ); ?>
            </div><!-- lupita-venue-map -->

            <?php } ?>	
		
            <div style="clear:both"></div>

            </div><!-- closing .event-meta -->
            
        </div><!-- lupita-right-column-->

    <div class="comments-template">
        <!-- If comments are enabled, show them -->
        <?php 
            // If comments are open or we have at least one comment, load up the comment template.
			if ( comments_open() || get_comments_number() ) :
				comments_template();
			endif;
                ?>
            </div>	
    
    <?php endwhile; // end of the loop. ?>

</div><!-- lupita-content-->

</main><!-- #content -->
</div><!-- #primary -->

<!-- Call template footer -->
<?php get_footer();