'Unsupported Filling Mode' error while sending order from Python API to Meta Trader 5

I am developing a Python program. When I try to send an order from Python to Meta Trader 5 (Alpari broker), I get an error:

Unsupported Filling Mode

I tried the following code:

# Import the libraries
import MetaTrader5 as mt5
from datetime import datetime
 
# Create the bound between MT5 and Python
mt5.initialize()
 
# Place buy order

# Initialization value
symbol = "EURUSD"
lot = 0.01
 
# Choose the deviation
deviation = 10

# Find the filling mode of symbol
filling_type = mt5.symbol_info(symbol).filling_mode
 
# Create dictionary request
request = {
     "action": mt5.TRADE_ACTION_DEAL,
     "symbol": symbol,
     "volume": lot,
     "type": mt5.ORDER_TYPE_SELL,
     "price": mt5.symbol_info_tick(symbol).bid,
     "deviation": deviation,
     "type_filling": filling_type,
     "type_time": mt5.ORDER_TIME_GTC
}
 
mt5.order_check(request)

The result was as below:

 OrderCheckResult(retcode=10030, balance=0.0, equity=0.0, profit=0.0,
 margin=0.0, margin_free=0.0, margin_level=0.0, comment='Unsupported
 filling mode', request=TradeRequest(action=1, magic=0, order=0,
 symbol='EURUSD', volume=0.01, price=1.0793, stoplimit=0.0, sl=0.0,
 tp=0.0, deviation=10, type=1, type_filling=1, type_time=0,
 expiration=0, comment='', position=0, position_by=0))

Can anyone help me to make this problem fixed? How I can translate the SYMBOL_FILLING_MODE to the ENUM_ORDER_TYPE_FILLING value?

Thanks in advance!

Solution

I've experienced the same issue just now, and I realized I haven't allow the Algo Trading option in MT5 terminal

You need to configure the MT5 terminal to allow automated trading. Here are the steps:

Open the MT5 terminal and go to Tools > Options.
In the Options window, go to the Expert Advisors tab.
Check the box next to Allow automated trading.
Check the box next to Allow DLL imports.
Click OK.
Finally you need to click the "Algo Trading" button on the menu bar, ensure it's in green color

Hope it helps :)