Hi Ela!
Try to put in comment line 346, 347 and 348 in file autologin-links.php
// if (strlen($cleanedKey) != PKG_AUTOLOGIN_CODE_LENGTH) {
// wp_die(__(‘Invalid autologin code.’, PKG_AUTOLOGIN_LANGUAGE_DOMAIN));
// }
That works for me.
Regards,
Nickolay Petrov