Unable to submit application for job that is published to an Agency

[Former Member]

I have a job that is solely published to an Agency:

When I try to submit a JobApplication via the ODATA API, SuccessFactors tells me the "Job requisition not posted or already expired", despite it actually being active (but only for an Agency).

What do I have to do to make SuccessFactors respect the posting to the Agency? Right now I'm simply submitting this JSON payload:

{
    "candidateId": "70129",
    "jobReqId": "18967",
    "zip": "80222",
    "address": "Testreet 4",
    "city": "Munich",
    "referralSource": {
        "__metadata": {
            "type": "SFOData.PicklistOption"
        },
        "id": "5891"
    }