kline query return invalid argument

[fireghostea]

i use this json object
{"method":"kline.query","params":["BTCUSDT",60],"id": 15}
but the server response is
{"error": {"code": 3001, "message": "invalid argument"}, "result": null, "id": 15}
why?
other methods seems to work correctly

[Irantechs]

having the same issue

[Rayan1392]

I have the same issue
I set subscription json parameter like this:
async def subscribe_kline(self, conn):
param = {
"id" : 1,
"method": "kline.query",
"params": ['BTCUSDT', "5m"]
}
await conn.send(json.dumps(param))
res = await conn.recv()
print(json.loads(res))

I get this message:
{'error': {'code': 1, 'message': 'invalid argument'}, 'result': None, 'id': 1}

I don't have any problem with "depth.subscribe" method and it works good.