After manually updating WordPress, HTTP Error 500 appeared. I configured PHP directives and these errors showed up
Warning: require(/home/vol6_7/epizy.com/epiz_30806720/htdocs/wp-includes/version.php): failed to open stream: No such file or directory in /home/vol6_7/epizy.com/epiz_30806720/htdocs/wp-settings.php on line 33
Fatal error: require(): Failed opening required '/home/vol6_7/epizy.com/epiz_30806720/htdocs/wp-includes/version.php' (include_path='.:/usr/share/pear/') in /home/vol6_7/epizy.com/epiz_30806720/htdocs/wp-settings.php on line 33
This is what line 32-34 contains.
global $wp_version, $wp_db_version, $tinymce_version, $required_php_version, $required_mysql_version, $wp_local_package;
require ABSPATH . WPINC . '/version.php';
require ABSPATH . WPINC . '/load.php';
While version.php doesn't exists in /htdocs/wp-includes/