Problem when sending out the invitation

I'm facing an issue where the invitation isn't being sent to the recipient, even though the API request runs successfully.

I followed the tutorial in the link below, but the response I received is slightly different.
https://learn.microsoft.com/en-us/graph/api/driveitem-invite?view=graph-rest-beta&tabs=http

It has the Invitation in the return response 

My response result doesn't have the invitation. As result I did no receive any invitation email. Anyone can help me this?