I was having an issue with my google calendar embedded into my Notes
calendar. I was getting the message "Must be a calendar user to use Google
Calendar private feeds"
Google changed their API
IBM is working on a more permanent fix but here is the workaround.
First removed the google calendar from the list in your Notes client.
Open up your google calendar in a browser. If you have a composite
calendar pick the one that you want to add to your Notes calendar and
click the twistie to it's right and select Calendar settings.
Down by "Embed This Calendar" is an ICAL button. Click that. Copy the URL
that appears into your clipboard. It may look something like
Back in your Notes client click Add a Calendar. Instead of Google use
iCalendar feed. The Label can be what you want. Use your google name for
the user name (ie myname@xxxxxxxxx). In URL paste that URL you copied to