iCal link problem

iCal link problem

Could you check my calendar invite link looks correct:
https://calendar.zoho.com/ical/799578c6bda5555ba78a060d457854ceeefdce3c2e67800dba60a7c9e908da414a64100d17cdc3bb/mailto

I'm unable to add it in to my Google calendar.  My calendar is shared as public.

Also in my settings I don't have a sync option to activate with Google/Outlook - is there a reason for this?

Thanks, 


Matt