Warning: main(/home/runrevi/public_html/wp-includes/class-IXR.php): failed to open stream: No such file or directory in /home/runrevi/public_html/xmlrpc.php on line 55

Warning: main(): Failed opening '/home/runrevi/public_html/wp-includes/class-IXR.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/runrevi/public_html/xmlrpc.php on line 55

Fatal error: Class wp_xmlrpc_server:  Cannot inherit from undefined class ixr_server in /home/runrevi/public_html/xmlrpc.php on line 108