> Same here.  I googled this error and Google Calendars had the same
> issue back in August according to this post  below by "Chappie":

> I've had iCal syncing with Gcal for a while now, but last night,
> after
> adding a few new calendar entries in iCal, I noticed there was an
> exclamation icon beside my Gcal account.  Clicking the icon reveals
> the error message
> "Error while refreshing
> Calendar https:[email address]/user
> could not be found."

> So here we are again.  I have Mac OSX 10.5.6.  It just checked again,
> and the exclamation point is now gone.  Looks like some kind of
> intermittent error on Google's server end.

> On Dec 20, 4:01 pm, Bama Gambler wrote:

> > From time to time I get the following error in iCal when it tries to
> > refresh a google calendar:

> > Request Error

> > Calendar could not be found.

> > This is really annoying as it causes the iCal icon to keep jumping in
> > the doc.  Then it does it every 5 minutes when it tries to refresh the
> > calendar.  After a few times it refreshes with no problem.