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