Good afternoon Tony and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the Calendar being blank when you are switching views.
I would love to help you with this topic.
As a first troubleshooting step, could you please provide us with your complete system information in a private reply using the instructions found in the following link?
https://theeventscalendar.com/knowledgebase/sharing-sys-info/
Without knowing more, my best recommendation (based on the Console view of your site) would be to install the following plugin: https://wordpress.org/plugins/ssl-insecure-content-fixer/
The reason being that it looks like there might be an issue with mixed content on your site.
Let me know if that helps.
Have a great day!
Geoff B.