Can't sync google calendar

[Joe Barnett]

Some time this week my xenial + gnome3-staging PPA install of evolution stopped syncing my google calendars. when trying to enable a calendar in the calendar view, the top error bar shows:

Failed to open calendar '<email address hidden> : Home'
Unable to connect to 'Home': Timeout was reached

and the calendar unchecks itself from being displayed

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: evolution 3.19.90-0ubuntu1~xenial2 [origin: LP-PPA-gnome3-team-gnome3-staging]
ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6
Uname: Linux 4.4.0-17-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Apr 7 18:36:47 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-08-21 (230 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64 (20150819)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: Upgraded to xenial on 2016-02-16 (51 days ago)