Good evening Kam and welcome back!
Thank you for reaching out to us.
I would love to help you with this topic.
You did find the perfect link to use full calendar shortcodes in a normal WordPress page.
Kudos on that!
The reason why the shortcode is not working is because you need to update the Events Calendar Pro to the latest version (4.3.1.1). You currently have 4.2.6 in place
By the way, that is also true of your Event Tickets Plus plugin. If nothing else, it is far preferable to have matching versions of our plugins, otherwise unexpected behaviour can happen.
Let me know how that goes.
Best regards,
Geoff B.