CF7 Redirect version 2.6.0. stopped working

With CF7 Redirect version 2.5.0. there were no problems, the redirect worked fine.
Updating to version 2.6.0. stopped this however. After sending the form you will receive the standard message “form has been send”.

I have read this page:
https://contactform7.com/redirecting-to-another-url-after-submissions/

I am using theme Twenty Seventeen. I am not sure in which file to add the code. Can anyone give me a clue?

<script>
document.addEventListener( ‘wpcf7mailsent’, function( event ) {
location = ‘https://example.com/’;
}, false );
</script>

Thanks in advance,
Rudolph Smits, Netherlands

The page I need help with: [log in to see the link]