I understand in part.
The page 'kontakt fel.php' is an error page that is only supposed to appear if it goes wrong.
The page 'kontakt tack.php' is a thank you page to be displayed if everything is right.
Can I choose both thank you page and error page in the UE on the contact page, or do I need to do this, on the thank you page? What should I choose in 'failed redirect' on the contact page?