Add error log

src/participant/participant.ts

@@ -371,6 +371,7 @@ export default class ParticipantController {
       return runnableContent.length ? runnableContent.join('') : null;
     } catch (error) {
       /** If anything goes wrong with the response or the stream, return null instead of throwing. */
+      log.error('Error while exporting to playground', error);
       return null;
     }
   }