HI Taco,

1. Reinstall template, looks like not existing file.
2. Reinstall all major extensions (page builder, jce and others)
3. Reinstall Joomla core

Check the error logs of your server; files don't disappear like that! Ask hosting support to scan your server for malware files. Allow them to delete any tread.

2nd important! Change PHP version, PHP 8.0 is not supported anymore, also becuase of security reasons! Use PHP 8.2 or PHP 8.3, for example.

Tnx but the php version is 8.2 by the hosting

and nothing is working every item i click a get that error

OK, I asked becuase I saw that "phpbuilds/php-8.0/pear"

Since when you have that error? Yesterday or today, or you don't know exactly?

Maybe you should recover site files from backup (day before problem appear), sometimes it's the only way to fix those things.

Hostig support should help. They should scan your site as well.

it works again;, i replace 2 index.php

Anyway, someone had to touch those files, it could be a hacker script that edited/damaged them

Scan your site using Firewall from cPanel!