Exception on fe_users edit (non directmail page): Call to undefined method TYPO3\CMS\Core\Site\Entity\NullSite::getAllLanguages()

[Patta]

TYPO3 12.4.22
PHP 8.2
direct_mail 12.x 500a858

Exception on fe_users edit (non directmail page):

Core: Exception handler (WEB): Uncaught TYPO3 Exception: Call to undefined method TYPO3\CMS\Core\Site\Entity\NullSite::getAllLanguages() | Error thrown in file /var/www/html/vendor/directmailteam/direct-mail/Classes/SelectCategories.php in line 42. Requested URL: https://www.mysite.localhost/typo3/record/edit?token=--AnonymizedToken--&edit%5Bfe_users%5D%5B4911%5D=edit&returnUrl=/typo3/module/web/list?token%3D--AnonymizedToken--%26id%3D9951%26table%3D%26pointer%3D1

fe_users folder is placed outsite of site root.