Offer API - trying to get offers that have been created/updated after a given date



Hi, I'm trying to extract all offers that have been created after a certain date.
POST Request: https://api.icims.com/customers/[custid]/offer/search
Headers: "Content-Type":"application/json","accept":"application/json"
Body:
{
"page": 1000,
"pageSize": 1000,
"sort": {
"field": "TOffer_FCreatedDate",
"direction": "asc"
},
"filters": {
"field": "TOffer_FCreatedDate",
"operator": "gt",
"value": ["2019-03-20T19:03:58.700Z"]
}
}
I'm getting 500 Internal Server Error
{
"errors": [
{
"errorMessage": "An unknown error occurred.",
"errorCode": 0
}
]
}
-> Can you pls help to correct the error?
-> Is there a field "TOffer_FUpdatedDate" in Offer object?

Pls help, many thanks