My wordpress site just went down on me

Good day people, I was on my site yesterday and it just went down on me. I cannot get into wp-admin or any thing.

I was wondering how do I reinstall wordpress and keep my content and database.

I checked my error log and got a couple message

PHP Fatal error: require(): Failed opening required ‘/var/www/vhosts/xxxxxxxxx/httpdocs/wp-includes/load.php’ (include_path=’.:’) in /var/www/vhosts/xxxxxxxxx/httpdocs/wp-settings.php on line 21