Is anyone else having trouble getting Calendar to connect to their Google Calendar? I consistently get "Calendar can't connect to the Google account 'Gmail'," with a request for me to enter my password. When I enter it, the dialog reports "The server responded with an error." All is still working fine on my Mavericks machine, so I'm assuming this is a Yosemite problem. I tried disabling and re-enabling my Google account in Calendar / Accounts. That didn't help.