google calendar setup just gives a blank page

google calendar setup just gives a blank page

Hi there, I tried this is different browsers, computers, and admin users.  All give a blank page.
https://crm.zoho.com/crm/setupInner.do?page=GApps.do?mode=showZG&tab=addons&in=googleApps
I click on Calendar, then click "Set up Synchronization Scheduler".
And then for a flash of a second, I see the setup page, before it redirects to a blank page.
This screencast shows the process.
http://screencast.com/t/Rx1si6qVfqRN