Coworker was having GCal problems and asked me to assist. Seems like my issue is the same as spoonofmilk’s: Calendar was working for a number of months and recently started displaying errors instead. The calendar ID I’m using is just an email address, not the “group.calendar.google.com” as in the plugin examples.
Having the same issue on a site using this plugin. I’ll post back if we determine the cause.
