Dear Phil:
I recently got this from Google, but I am not savvy enough to know for sure if this will affect the plugin, can you let us know?
Thank you,
Fred
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Important announcement about XML feeds in Google Calendar
Because of low usage, and in an effort to streamline our services, from 18 November 2015, XML feeds will no longer be available in Google Calendar. You’re getting this message because you’re currently viewing or sharing a link to one or more of your calendars using an XML feed.
We apologise for any inconvenience caused. Google Calendar will continue to support three ways of viewing your calendars in other applications or on websites. You can:
Access your calendar in other applications, such as Microsoft Outlook or Apple Calendar, using iCal.
Embed your calendar in your website or blog using HTML.
Use the Google Calendar API to display, create and modify calendar events if you’re a developer.
Finally, you can always view and manage your calendars using the Google Calendar app for Android, iPhone or on the web.
– The Calendar team