It does not create an account in the database

Question

I changed from IPS 3 to IPS 4 and can not create a user account with PHP.

This is for a new Linux server, running MySQL 5, PHP 7.3.1 and Nginx. The engine is IPS 4.4.3.

require_once('init.php');

$member = new \IPS\Member;
$member->real_name = 'Test php';
$member->encryptedPassword('test');
$member->save();
?>

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