Can not create session

I create session but i'm get error "Failed to parse input"

i use postman and sent method POST from link:

https://webapi.teamviewer.com/api/v1/sessions?groupid=g75436837

my error:

{
    "error": "invalid_request",
    "error_description": "Failed to parse input.",
    "error_code": 1
}

 I try use api get full list session and it run success, but i create session same above i get error. Please help me, thanks.