Issue with Google Calendar

Hi,

I try to link my Google Calendar entries with my Client table. I read this page :

and tried the formula GCAL_MEETINGS_WITH(“Calendar”, [Email])

I have an issue while using the formula in a virtual column of the Client table :
Capture1

even if I used the process to add a table from Google agenda entry.

However the Data source of google aganda table looks different :
Capture

Any idea ?