Deprecated: Return type of Contao\CoreBundle\Picker\PickerConfig::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao/core-bundle/src/Picker/PickerConfig.php on line 134