Just tried installing woocommerce and adding a product, but got a bug: Warning: require(/wordpress/wp-includes/post.php): Failed to open stream: No such file o

Just tried installing woocommerce and adding a product, but got a bug: Warning: require(/wordpress/wp-includes/post.php): Failed to open stream: No such file or directory in /wordpress/wp-settings.php on line 2 Fatal error: Uncaught Error: Failed opening required '/wordpress/wp-includes/post.php' (include_path='.:') in /wordpress/wp-settings.php:2 Stack trace: #0 /wordpress/wp-config.php(11): require_once() #1 /wordpress/wp-load.php(2): require_once('/wordpress/wp-c...') #2 /wordpress/wp-admin/admin.php(2): require_once('/wordpress/wp-l...') #3 /wordpress/wp-admin/post.php(2): require_once('/wordpress/wp-a...') #4 {main} thrown in /wordpress/wp-settings.php on line 2 There has been a critical error on this website.