Issue #3462050: Add support for self hosted tableau sub dirs.

Closes #3462050

src/Plugin/Field/FieldFormatter/MediaTableauEmbedFormatter.php

@@ -32,7 +32,7 @@ class MediaTableauEmbedFormatter extends MediaRemoteFormatterBase {
       $hosts[] = preg_quote($host, '/');
     }
 
-    return '/^(' . implode('|', $hosts) . ')\/(app\/profile\/.*\/viz\/.*|views\/.*)/';
+    return '/^(' . implode('|', $hosts) . ')\/(.*\/)?(app\/profile\/.*\/viz\/.*|views\/.*)/';
   }
 
   /**