Fatal error: Uncaught Error: Class "IXR_Client" not found in D:\XAMPP\htdocs\UTeM\penerbit\wp-includes\IXR\class-IXR-clientmulticall.php:8
Stack trace:
#0 {main}
thrown in D:\XAMPP\htdocs\UTeM\penerbit\wp-includes\IXR\class-IXR-clientmulticall.php on line 8