Error: Call to undefined method Minds\Entities\Activity::getFlag()

Sentry Issue: ENGINE-62

Error: Call to undefined method Minds\Entities\Activity::getFlag()
  File "/Controllers/api/v1/media.php", line 86, in Minds\Controllers\api\v1\media::get
    $response['entity']['paywalled'] = $entity->getFlag('paywall') && $entity->getWireThreshold();
  File "/Api/Factory.php", line 90, in Minds\Api\Factory::build
    return $handler->$method($pages);
  File "/Controllers/api/api.php", line 76, in Minds\Controllers\api\api::get
    return Factory::build($pages, $this->request, $this->response);
  File "/Core/Router.php", line 157, in Minds\Core\Router::route
    return $handler->$method($pages);
  File "/index.php", line 9
    $router->route();