Steps to reproduce the issue

Create a cron taks:
php -d memory_limit=512M httpdocs/cli/joomla.php finder:index

Expected result

Task is successfully completed

Actual result

Error message:

Symfony\Component\ErrorHandler\Error\UndefinedFunctionError {#164
  #message: "Attempted to call function "simplexml_load_file" from namespace "Joomla\CMS\Language"."
  #code: 0
  #file: ".httpdocs/libraries/src/Language/LanguageHelper.php"
  #line: 614
  trace: {
    .httpdocs/libraries/src/Language/LanguageHelper.php:614 {
      Joomla\CMS\Language\LanguageHelper::parseXMLLanguageFile($path)
      › // Try to load the file
      › $xml = simplexml_load_file($path);
      › 
    }
    .httpdocs/libraries/src/Language/LanguageHelper.php:516 { …}
    .httpdocs/libraries/src/Language/Language.php:203 { …}
    .httpdocs/libraries/src/Language/LanguageFactory.php:35 { …}
    .httpdocs/libraries/src/Language/CachingLanguageFactory.php:45 { …}
    .httpdocs/libraries/src/Service/Provider/Application.php:130 { …}
    .httpdocs/libraries/vendor/joomla/di/src/ContainerResource.php:176 { …}
    .httpdocs/libraries/vendor/joomla/di/src/Container.php:96 { …}
    .httpdocs/cli/joomla.php:75 { …}
  }
}

System information (as much as possible)

Joomla 4 and 5
Linux
Plesk

Additional comments

SimpleXML is enabled
https://joomla.stackexchange.com/questions/33733/cannot-set-up-cron-task-for-smart-search-in-joomla-4