KeyError: '__restricted__'

[MeMine]

I am trying to load data into cerebro, and the data is in the form of a pandas dataframe.

import pandas as pd
import backtrader as bt 
import backtrader.feeds as btfeeds

df = pd.read_csv('csvfile.csv', index_col=0)
df['datetime'] = pd.to_datetime(df['datetime'])
data = PandasData(dataname=df)

cerebro = bt.Cerebro()
cerebro.addstrategy(TestStrategy)
cerebro.adddata(data)
cerebro.run()

class PandasData(btfeeds.PandasData):
	params = (
		('datetime','datetime'),
		('open','open'),
		('high','high'),
		('low','low'),
		('close','close'),
		('volume','volume'),
		('openinterest',None),
	)
	datafields = [
        'datetime', 'open', 'high', 'low', 'close', 'volume'
    ]

class TestStrategy(bt.Strategy):
	def log(self, txt, dt=None):
		dt = dt or self.datas[0].datetime.date(0)
		print('%s, %s' % (dt.isoformat(), txt))		

	def __init__(self):
		self.ma10 = bt.talib.SMA(self.data.close, 10)
	
	def next(self):
		if self.data.close > self.ma10:
			self.log('Close, %.2f' % self.dataclose[0])
		elif self.data.close < self.ma10:
			self.log('Close, %.2f' % self.dataclose[0])

I have looked up the community for answers but I did not manage to find a solution to this error:

File "/controllers/backtest.py", line 10, in index
    data = PandasData(dataname=df)
File "/modules/backtrader/metabase.py", line 86, in __call__
    _obj, args, kwargs = cls.donew(*args, **kwargs)
File "/modules/backtrader/lineseries.py", line 419, in donew
    _obj, args, kwargs = super(MetaLineSeries, cls).donew(*args, **kwargs)
File "/modules/backtrader/lineroot.py", line 48, in donew
    _obj, args, kwargs = super(MetaLineRoot, cls).donew(*args, **kwargs)
File "/modules/backtrader/metabase.py", line 244, in donew
    clsmod = sys.modules[cls.__module__]
KeyError: '__restricted__'

Kindly advise. Thank you!