Calendar Confusion and Questions

Hello All,

I am very new to Concrete and am trying to add a Calendar to one of my pages.
When I try to add the calendar, I get the error “You must choose a valid calendar event attribute to store the event within.” The “Calendar Event Attribute” drop-down does not have any values in it. I have created some Calendar Event Attributes using the Dashboard→Calendar & Events→Attributes, but these do not show up in the list.

Very confused…. and a little dazed.

Also, is there a way to sync or import or connect a Concrete calendar with a Google calendar? Our non-profit org uses Google Workspaces and I would like to manage just one set of calendar events.

Versions:
Concrete: 9.4.7
PHP: 8.3

Ok, I think that is enough for my first post.

Thank you very much in advance.

Ray