Wordpress and Cpanel expert repairing error 500

I have a dedicated server at OVH with WHM and Cpanel

Since the last few days, my wordpress website has experienced error 500 such as:



Warning: Constant WP_DEBUG already defined in /home/hwsinet/public_html/wp-config.php on line 78

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

Fatal error: Uncaught Error: Failed opening required '/home/hwsinet/public_html/wp-includes/version.php' (include_path='.:/opt/cpanel/ea-php81/root/usr/share/pear') in /home/hwsinet/public_html/wp-settings.php:33 Stack trace: #0 /home/hwsinet/public_html/wp-config.php(80): require_once() #1 /home/hwsinet/public_html/wp-load.php(50): require_once('/home/hwsinet/p...') #2 /home/hwsinet/public_html/wp-blog-header.php(13): require_once('/home/hwsinet/p...') #3 /home/hwsinet/public_html/index.php(17): require('/home/hwsinet/p...') #4 {main} thrown in /home/hwsinet/public_html/wp-settings.php on line 33



I repair it reinstalling manually the wordpress, but after some hours it breaks again.


I want my wordpress to work with php 8.1 and it must have these plugins:


Advanced Editor Tools (previously TinyMCE Advanced)

Schema & Structured Data for WP & AMP

Spectra

Ultimate Blocks

Rank Math SEO

Instant Indexing