$body = sprintf($body, DI::baseUrl()->get(), $user['nickname'], $result['password'], DI::config()->get('config', 'sitename'));
$email = DI::emailer()
- ->newSystemMail(DI::app(), (!empty($user['language'])) ? DI::l10n()->withLang($user['language']) : DI::l10n())
+ ->newSystemMail((!empty($user['language'])) ? DI::l10n()->withLang($user['language']) : DI::l10n())
->withMessage(DI::l10n()->t('Registration details for %s', DI::config()->get('config', 'sitename')), $preamble, $body)
->forUser($user['uid'] ?? 0)
->withRecipient($user['email'])