Hello Stefano,
I got rid of pie Register to have my page working, everything works so far, users get subscribed on Registration and confirmed on fist Login.
But I the customer gets this error after submitting a Registration:
Warning: Illegal string offset ‘noconfirmation’ in /wp-content/plugins/newsletter/subscription/subscription.php on line 363
Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/newsletter/subscription/subscription.php:363) in /wp-includes/pluggable.php on line 1171
and a similar on first Login. But still the Newsletter plugin and Registration and Login in works, if you just reload the page.
Thank you for any help