I had a lot of searching to do why it wasn’t working. But that is the fun of playing with Kodular.
You need an extension that is in essence a new Activitystarter. I forgot that part when i gave you my answer. See the link below to get the extension. Maybe the @kodular developers can make the change so you don’t need a seperate extension.
https://groups.google.com/forum/#!msg/mitappinventortest/IM9yDZDAm-Q/IcxUtvX2BQAJ
With this new extension i used these blocks
and i was able to insert the event in my Google Calendar.
I hope it is also working for you.