Time out while try to buy order

[MongkonEiadon]

I've sent the request with

{
  "name": "buyV2",
  "msg": {
    "price": 1,
    "act": 76,
    "exp": 1521911963,
    "type": "turbo",
    "direction": "call",
    "time": 1521911903.05
  }
}

but the result is respond

{
  "name": "buyComplete",
  "request_id": "",
  "msg": {
    "isSuccessful": false,
    "message": ["Time for purchasing options is over, please try again later."],
    "result": { "request_id": null }
  }
}

I've checked the timeout is in the future,