I am getting below error while backtesting my strategy. Can you please help me to resolve thid issue?
[BT] [2020-09-14 09:15:00] [INFO] [tls] --------------------Master Cfg Parameters:--------------------
[BT] [2020-09-14 09:15:00] [INFO] [tls] User: ALGOBULLS VIRTUAL USER
[BT] [2020-09-14 09:15:00] [INFO] [tls] Broker: ABVIRTUALBROKER
[BT] [2020-09-14 09:15:00] [INFO] [tls] AUTO_ADD_INSTRUMENTS_BUCKET_FROM_POSITIONS: False
[BT] [2020-09-14 09:15:00] [INFO] [tls] AUTO_ADD_INSTRUMENTS_BUCKET_FROM_HOLDINGS_TPLUS1: False
[BT] [2020-09-14 09:15:00] [INFO] [tls] AUTO_ADD_INSTRUMENTS_BUCKET_FROM_HOLDINGS_TPLUS2: False
[BT] [2020-09-14 09:15:00] [INFO] [tls] RESUME_POSITIONS_ON_START: True
[BT] [2020-09-14 09:15:00] [INFO] [tls] RESUME_HOLDINGS_TPLUS1_ON_START: True
[BT] [2020-09-14 09:15:00] [INFO] [tls] RESUME_HOLDINGS_TPLUS2_ON_START: True
[BT] [2020-09-14 09:15:00] [INFO] [tls] EXIT_INTRADAY_ORDERS_ON_STOP: False
[BT] [2020-09-14 09:15:00] [INFO] [tls] EXIT_TPLUS1_DELIVERY_ORDERS_ON_STOP: False
[BT] [2020-09-14 09:15:00] [INFO] [tls] EXIT_TPLUS2_DELIVERY_ORDERS_ON_STOP: False
[BT] [2020-09-14 09:15:00] [INFO] [tls] --------------------User Cfg Parameters: System Parameters--------------------
[BT] [2020-09-14 09:15:00] [INFO] [tls] Trading type: BACKTESTING
[BT] [2020-09-14 09:15:00] [INFO] [tls] User trading start time: 2020-09-14 09:15:00
[BT] [2020-09-14 09:15:00] [INFO] [tls] User trading end time: 2020-09-18 15:15:00
[BT] [2020-09-14 09:15:00] [INFO] [tls] --------------------User Cfg Parameters: Funds Parameters--------------------
[BT] [2020-09-14 09:15:00] [INFO] [tls] Credit Exposure: 1
[BT] [2020-09-14 09:15:00] [INFO] [tls] Fund Allocator: FundAllocatorLots
[BT] [2020-09-14 09:15:00] [INFO] [tls] Fund Allocator Parameters: {'NUMBER_OF_LOTS': 1}
[BT] [2020-09-14 09:15:00] [INFO] [tls] --------------------User Cfg Parameters: Candle Parameters--------------------
[BT] [2020-09-14 09:15:00] [INFO] [tls] Candle interval (sec): 900
[BT] [2020-09-14 09:15:00] [INFO] [tls] --------------------User Cfg Parameters: Strategy Parameters--------------------
[BT] [2020-09-14 09:15:00] [INFO] [tls] Strategy: Undestand working of strategy
[BT] [2020-09-14 09:15:00] [INFO] [tls] Parameters: {'timeperiod1': 5.0, 'timeperiod2': 12.0}
[BT] [2020-09-14 09:15:00] [INFO] [tls] Strategy Mode: INTRADAY
[BT] [2020-09-14 09:15:00] [INFO] [tls] Instruments Bucket: instruments_bucket | [NSE_EQ:TCS]
[BT] [2020-09-14 09:15:00] [INFO] [tls] --------------------User Cfg Parameters: Risk Management Parameters--------------------
[BT] [2020-09-14 09:15:00] [INFO] [tls] Target Trigger: 0.1000
[BT] [2020-09-14 09:15:00] [INFO] [tls] Stoploss Trigger: 0.1000
[BT] [2020-09-14 09:15:00] [INFO] [tls] Trailing Stoploss Trigger: 0.1000
[BT] [2020-09-14 09:15:00] [INFO] [tls] Desired profit: 1000000.0
[BT] [2020-09-14 09:15:00] [INFO] [tls] Risk Appetite: 10000.0
[BT] [2020-09-14 09:15:00] [INFO] [tls] PNL scan frequency (in sec): 30
[BT] [2020-09-14 09:15:00] [INFO] [tls] --------------------User Cfg Parameters: Other Parameters--------------------
[BT] [2020-09-14 09:15:00] [INFO] [tls] Allow multiple orders for same script: True
[BT] [2020-09-14 09:15:00] [INFO] [tls] Allow new order when order for script already running: True
[BT] [2020-09-14 09:15:00] [INFO] [tls] Instrument max orders count: 100
[BT] [2020-09-14 09:15:00] [INFO] [tls] Remove Instrument if Order Rejected: False
[BT] [2020-09-14 09:15:00] [INFO] [tls] ------------------------------------------------------------
[BT] [2020-09-14 09:15:00] [INFO] [utils] Instrument (NSE_EQ:TCS) subscribed to historical data successfully
[BT] [2020-09-14 09:15:00] [INFO] [utils] 1 Instrument(s) (re)subscribed to historical data successfully
[BT] [2020-09-14 09:15:00] [INFO] [utils] Prefetching historical data for 1 instruments...
[BT] [2020-09-14 09:15:00] [INFO] [tls] [User: ALGOBULLS VIRTUAL USER] Trading session completed
[BT] [2020-09-14 09:15:00] [INFO] [oms]
PENDING ORDERS:
COMPLETED ORDERS:
POSITIONS:
HOLDINGS:
[BT] [2020-09-14 09:15:00] [CRITICAL] [tls] Dumping Debug Stack to Python friendly Traceback Format for Python Build Customers: Uncaught exception | Exception Class: <class 'AttributeError'> | Exception Details: 'DataFrame' object has no attribute '_data'
[BT] [2020-09-14 09:15:00] [CRITICAL] [tls] An error has occurred due to which the strategy cannot proceed anymore. Please double check the tweak parameters. If you are a Python Build customer, please double check your strategy code. If everything seems fine, please contact support@algobulls.com for support.