adding embed code for a event calendar

hello,

I'm trying to add this embed code for a events calendar from another website.

they gave me this script to uploaded;

<script src=https://www.whatshappeningdurango.com/api/calendar.js></script>
<script>loadWHDcal('site08');</script>

I tried adding it to my website,

exploredgo.com/events but it is not working.

here is the website event calendar I'm trying to upload;

whatshappeningdurango.com

Does the script look accurate?

Thanks in advance