Only load the player when there is an episode ID

source/_layouts/podcast_episode.html.twig

@@ -9,6 +9,7 @@
 {% endblock %}
 
 {% block content_wrapper %}
+  {% if transistor.id %}
     <div>
       <iframe
         width="100%"
@@ -19,6 +20,7 @@
         src="https://share.transistor.fm/e/{{ page.transistor.id }}">
       </iframe>
     </div>
+  {% endif %}
 
   {{ parent() }}