Warning: require(/var/www/html/wp-includes/theme.php): Failed to open stream: No such file or directory in /var/www/html/wp-settings.php on line 188

Fatal error: Uncaught Error: Failed opening required '/var/www/html/wp-includes/theme.php' (include_path='.:/usr/share/php') in /var/www/html/wp-settings.php:188 Stack trace: #0 /var/www/html/wp-config.php(112): require_once() #1 /var/www/html/wp-load.php(50): require_once('...') #2 /var/www/html/wp-blog-header.php(13): require_once('...') #3 /var/www/html/index.php(15): require('...') #4 {main} thrown in /var/www/html/wp-settings.php on line 188

Fatal error: Uncaught Error: Call to a member function set() on null in /var/www/html/wp-includes/l10n.php:857 Stack trace: #0 /var/www/html/wp-includes/l10n.php(960): load_textdomain() #1 /var/www/html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /var/www/html/wp-includes/l10n.php on line 857