Deprecated: Return type of LLMS_Post_Model::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /www/zhangxipiano_713/public/wp-content/plugins/lifterlms/includes/abstracts/abstract.llms.post.model.php on line 1060

Deprecated: Return type of LLMS_Notification::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /www/zhangxipiano_713/public/wp-content/plugins/lifterlms/includes/models/model.llms.notification.php on line 270
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