Good evening Edward and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
I would love to help you with this topic.
Just to confirm, did you apply the following snippet in the functions.php file of your theme (without the PHP tag at the top) ?: https://gist.github.com/cliffordp/81f23a207ab483c9e7c6d910f9b29c0a#file-functions-php
Could you please send me a copy of the latest version of your WordPress theme / child theme via a link to a .zip file link (stored Dropbox or Google Drive) so that I can run some tests on my end ? I recommend a private reply for that purpose.
Please ensure you are using the latest files as found on your actual website.
This way I will get access to any updates or customizations you might have made.
Hang in there!
Geoff B.