Warning: require(/app/wordpress/wp-includes/version.php): Failed to open stream: No such file or directory in /app/wordpress/wp-settings.php on line 34

Fatal error: Uncaught Error: Failed opening required '/app/wordpress/wp-includes/version.php' (include_path='.:') in /app/wordpress/wp-settings.php:34 Stack trace: #0 /app/wordpress/wp-config.php(220): require_once() #1 /app/wordpress/wp-load.php(50): require_once('/app/wordpress/...') #2 /app/wordpress/wp-blog-header.php(13): require_once('/app/wordpress/...') #3 /app/wordpress/index.php(17): require('/app/wordpress/...') #4 {main} thrown in /app/wordpress/wp-settings.php on line 34