kiteconnect.exceptions.InputException: Unknown `tradingsymbol` in MCX

import logging
from kiteconnect import KiteConnect

logging.basicConfig(level=logging.DEBUG)
global kite
try:
    kite = KiteConnect(api_key="api_key")
    kite.set_access_token("access_token")
    kite.profile()
    print("logged in")
except ke.TokenException as e:
    print('Sorry, there was an error [%s]. Let''s start over\n\n' % e)
# Place an order
ltp = kite.ltp('MCX:CRUDEOIL21DEC5100PE')['MCX:CRUDEOIL21DEC5100PE']['last_price']
print("LTP of CRUDEOIL21DEC5100PE is : " + str(ltp))
try:
    orderid = kite.place_order(tradingsymbol='CRUDEOIL21DEC5100PE', exchange=kite.EXCHANGE_MCX,
                               variety=kite.VARIETY_REGULAR,
                               transaction_type=kite.TRANSACTION_TYPE_BUY, quantity=1,
                               order_type=kite.ORDER_TYPE_LIMIT,
                               product=kite.PRODUCT_NRML, price=ltp)
    logging.info("Order placed. ID is: {}".format(order_id))
except Exception as e:
    logging.info("Order placement failed: {}".format(e.message))

DEBUG:urllib3.connectionpool:Starting new HTTPS connection (1): api.kite.trade:443
DEBUG:urllib3.connectionpool:https://api.kite.trade:443 "GET /user/profile HTTP/1.1" 200 None
DEBUG:urllib3.connectionpool:Starting new HTTPS connection (1): api.kite.trade:443
logged in
LTP of CRUDEOIL21DEC5100PE is : 51.8
DEBUG:urllib3.connectionpool:https://api.kite.trade:443 "GET /quote/ltp?i=MCX%3ACRUDEOIL21DEC5100PE HTTP/1.1" 200 None
DEBUG:urllib3.connectionpool:Starting new HTTPS connection (1): api.kite.trade:443
DEBUG:urllib3.connectionpool:https://api.kite.trade:443 "POST /orders/regular HTTP/1.1" 400 97
Traceback (most recent call last):
File "C:\autoTrade\zerodha_mcx_final - order - Copy.py", line 17, in
orderid = kite.place_order(tradingsymbol='CRUDEOIL21DEC5100PE', exchange=kite.EXCHANGE_MCX,
File "C:\Users\prary\AppData\Local\Programs\Python\Python39\lib\site-packages\kiteconnect\connect.py", line 355, in place_order
return self._post("order.place",
File "C:\Users\prary\AppData\Local\Programs\Python\Python39\lib\site-packages\kiteconnect\connect.py", line 841, in _post
return self._request(route, "POST", url_args=url_args, params=params, is_json=is_json, query_params=query_params)
File "C:\Users\prary\AppData\Local\Programs\Python\Python39\lib\site-packages\kiteconnect\connect.py", line 913, in _request
raise exp(data["message"], code=r.status_code)
kiteconnect.exceptions.InputException: Unknown `tradingsymbol`.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\autoTrade\zerodha_mcx_final - order - Copy.py", line 24, in
logging.info("Order placement failed: {}".format(e.message))
AttributeError: 'InputException' object has no attribute 'message'