Schema.org validation for events

Hello,

If we try to validate Schema.org data for this event:
https://search.google.com/test/rich-results/result/r%2Fevents?id=V2vgoxu0pHU5hDflzmG2Ag
https://test.schema.dev/
, it seems that:
“contactType
A value for the contactType field is required.”

And also missing data for “Related items” (they’re in the box at the bottom of the event page).

Is it possible to have the plugin have the data validate 100%?

Thank you!

The page I need help with: [log in to see the link]