Problem on wordpress website error 500

I am having problems with my wordpress website with my cpanel
these are the type of errors it reports

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

Fatal error: Uncaught Error: Failed opening required '/home/contascpagamento/public_html/wp-includes/version.php' (include_path='.:/opt/cpanel/ea-php81/root/usr/share/pear') in /home/contascpagamento/public_html/wp-settings.php:33 Stack trace: #0 /home/contascpagamento/public_html/wp-config.php(57): require_once() #1 /home/contascpagamento/public_html/wp-load.php(50): require_once('/home/contascpa...') #2 /home/contascpagamento/public_html/wp-blog-header.php(13): require_once('/home/contascpa...') #3 /home/contascpagamento/public_html/index.php(17): require('/home/contascpa...') #4 {main} thrown in /home/contascpagamento/public_html/wp-settings.php on line 33

In order to sort the issue I tried the following

I placed a backup and it worked, but in order for the problem not to occur again I reinstalled wordpress and plugins, and it worked but after 30 min aprox. the errors returned,
I tried php 7.4 and 8.1 but problems continue