message: return when update endpoint failed
diff: @@ -376,6 +376,7 @@ export class Sender extends BaseTelemetryPlugin implements IChannelControlsAI {
  if(xhr.status == 301 || xhr.status == 308 ) {
  if(!_checkAndUpdateEndPointUrl(xhr)) {
  _self._onError(payload, _formatErrorMessageXhr(xhr));
  + return;
  }
  }
  