Sick days balance does not yield any result

Hello everyone!
Did anyone have any luck with retrieving the number of sick days taken by each employee via API?
When I call for the absences ("https://api.personio.de/v1/company/employees/{{EMPLOYEE_ID}}/absences/balance") I get the paid vacation but nothing else. I tried changing the custom integration permissions but it does not change the end result. Any help appreciated! Thanks!