Deprecated: Return type of Concrete\Core\Application\UserInterface\Sitemap\TreeCollection\Entry\Group\GroupJsonFormatter::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/irishdeedsindex/public_html/blog/concrete/src/Application/UserInterface/Sitemap/TreeCollection/Entry/Group/GroupJsonFormatter.php on line 14