Deprecated: Return type of StellarWP\Learndash\StellarWP\Models\Model::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/naturlig/public_html/wp-content/plugins/sfwd-lms/vendor-prefixed/stellarwp/models/src/Models/Model.php on line 320
