Nevermind, found it.
Solution: create a canned reply, set it to private, share it.
Apparently you have to add the site to trusted sites in Internet Explorer to get this to work.
Thank you for your fast response and sorry for my late response. I used the XAMPP version with PHP version 7.0.8. Now I finally have it working, with XAMPP with PHP version 5.5.37. I know it should not make a difference concerning the javascript, but somehow it does. Will try later on to import the CSV file.
Thank you for your support 🙂
