Hi Phelan!
Thanks for reaching out to us! Let me help you with your issue.
Having a closer inspection to your site I can’t see the Event Tickets Plus plugin installed and activated on your site.
Could you please make sure the plugin is correctly installed? You can check this by going to your wp-admin > Plugins.
Remember you can get the latest version of our plugins by logging in to your account and going to this link > https://theeventscalendar.com/my-account/downloads/
Let me know how that goes.
Thanks,
Victor