CF does not send email json to functions.php

Hi, it seems that the contact forms plugin (up to date, PHP is 8.1) are not sending the Sender Email to the theme functions.php – I do get those kinds of errors, and no emails are sent. The Array Key of course does exist.

Functions.php Excerpt:
// add data to thank you form
add_filter(‘wpcf7_posted_data’, ‘save_application_form’, 10, 1);
function save_application_form( $array ) {

if ( isset( $_SESSION ) ) {
    $array["you_field"] = $_SESSION['kreditor-your-email']; //you_email
    $array["you_name"] = $_SESSION['kreditor-name']; //you_name
    return $array;
}

}

Error in Log:

2024/04/25 09:30:50 [error] 39887#39887: *5997 FastCGI sent in stderr: “PHP message: PHP Warning: Undefined array key “kreditor-your-email” in /www/blabla_960/public/wp-content/themes/generatepress_child/functions.php on line 345PHP message: PHP Warning: Undefined array key “kreditor-name” in /www/blabla_960/public/wp-content/themes/generatepress_child/functions.php on line 346″ while reading response header from upstream, client: 87.54.121.200, server: http://www.blabla.dk, request: “POST /wp-json/contact-form-7/v1/contact-forms/4279/feedback HTTP/2.0”, upstream: “fastcgi://unix:/var/run/php8.1-fpm-blabla.sock:”, host: “www.blabla.dk:24695”, referrer: “https://www.blabla.dk/rykker-med-inkassovarsel/”