Problem adding user

I have a new EX2, upgraded to OS5. When I add a user, this works well. But when I want to invite the user to cloud acces by sending an email, the system says “Updating” and stays like that. Nothing happens. I have tried with several users and email addresses. Anyone who managed to solve this problem?

Hi,

You may refer to the following KBA: https://support-en.wd.com/app/answers/detail/a_id/29972

Thanks but the answer does not help. It is not possible to share any resources for some reason.