Fatal error: Uncaught Error: Class 'IXR_Server' not found in /home/uiimedu/public_html/wpuiim2020/wp-includes.bak/IXR/class-IXR-introspectionserver.php:9 Stack trace: #0 {main} thrown in /home/uiimedu/public_html/wpuiim2020/wp-includes.bak/IXR/class-IXR-introspectionserver.php on line 9