How to Fetch linked object

I have created a person and employment. Now when I access employment , I need to get the person details. But the included is empty. In relationship, ( person) , I did not find the personId. The self and related links are not working.
Please help

https://integrations.cintra.cloud/integrations/3cabfea6-8556-4245-b932-8ae8d933a537/employments/EmploymentId/PW4?include=person

This seems to be an issue with your implementation not the specification itself. I would recommend asking at StackOverflow including more details about your implementation.