I am creating a customer invoices to sage 200 evolution version 10.1.2 xx,

I am using Freedom api and posting the entries over freedom rest api.

Here is the Request i made to this endpoint:  http:///localhost:5000/freedom.core/DEVELOPER/SDK/Rest/SalesOrderProcessInvoice

{
"quote": {
"CustomerAccountCode": "CASH",
"Description": "Hosting Fee",
"DocumentID": 0,
"FinancialLines": [
{
"AccountCode": "010-012",
"LineID": 0,
"Quantity": 1,
"TaxCode": 6,
"ToProcess": 1,
"UnitPrice": 50000.0
}
],
"InvoiceDate": "/Date(1700906865)/",
"OrderDate": "/Date(1700906865)/",
"Reference": "10512981573"
}
}

i am getting the following response error:

{
"HasError": true,
"ID": null,
"Message": "Specified argument was out of the range of valid values.\r\nParameter name: count",
"OperationPerformed": null,
"ValidationErrors": []
}

Anyone having an Idea on what could be causing this error?