Problem with buy

[raffvyr787iuf]

During starting below code:

from iqoptionapi.api import IQOptionAPI
import datetime
import time
import logging
logging.basicConfig(format='%(asctime)s %(message)s')

api = IQOptionAPI("iqoption.com", "[email protected]", "s3cr3tPassw0rd")

api.connect()
time.sleep(0.5)
print 'Your current balance is: {:.2f}'.format(api.profile.balance)

if api.timesync.server_datetime.second != 48:
    api.buy(1, 1, "turbo", "call")
time.sleep(0.5)

print 'Your current balance is: {:.2f}'.format(api.profile.balance)

I've got these results:

Your current balance is: 10.00
2018-05-28 16:37:08,377 {"msg": {"direction": "call", "price": 1, "act": 1, "exp": 1527518280.0, "time": 1527518227, "type": "turbo"}, "name": "buyV2"}

2018-05-28 16:37:08,421 {"name":"buyComplete","request_id":"","msg":{"isSuccessful":false,"message":["Invalid request"],"result":{}}}

2018-05-28 16:37:08,828 {"name":"timeSync","msg":1527518228903}
Your current balance is: 10.00

Can you help me with configuration? What I did wrong?