Invitees option for Calendar has disappeared

I am having the same problem with my Mac (desktop). When I create a new event in iCal the option to add invitees is not displayed.

thanks for any help

I had the same trouble...

When you click to add a new event, below Title, Location, Starts-Ends-Time Zone, Repeat, Alert, you'll see Calendar- click on Calendar...for me the invites only work when I click on the (yellow dot- Home) under iCloud.

It doesn't work with my gmail calendar.

Hope that helps....