Warning: require(/htdocs/wp-includes/version.php): Failed to open stream: No such file or directory in /htdocs/wp-settings.php on line 33

Fatal error: Uncaught Error: Failed opening required '/htdocs/wp-includes/version.php' (include_path='.:/usr/share/php') in /htdocs/wp-settings.php:33 Stack trace: #0 /htdocs/wp-config.php(95): require_once() #1 /htdocs/wp-load.php(37): require_once('/htdocs/wp-conf...') #2 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...') #3 /htdocs/index.php(17): require('/htdocs/wp-blog...') #4 {main} thrown in /htdocs/wp-settings.php on line 33