object(ReflectionClass)#9 (1) {
  ["name"]=>
  string(40) "Survivor\Controller\Site\GroupController"
}
string(4) "html"

Return type of GuzzleHttp\Cookie\CookieJar::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice