Theme my login 6.4 Missing notifications during registration

Good afternoon, maybe someone can tell you how to solve the next problem. Registration is configured on the site using the Theme my login plugin version 6.4. Configured registration with administrator approval. Registration works, but the problem is that after filling out the registration form and clicking the registration button, a notification does not appear:
Your registration was successful but you must now be approved by an administrator before you can log in. You will be notified by e-mail once your account has been reviewed.
As a result, the user does not understand that he has already registered and he needs to wait for the approval of his registration and tries to register again.