As of yesterday (02/11/2020), our site is no longer displaying an embedded Google Calendar (iframe). It appears correctly in the preview window when building the site but it shows a white box when visiting the site on any mobile device. It has been working correctly for years up until yesterday. I tried to add update the iframe SRC with both https and http, but Google will only display the calendar if the URL is https. Again, nothing has changed , it just stopped working all of the sudden.

Any suggestions?

Thank you!