a problem AttributeError: 'Plot_OldSync' object has no attribute 'mpyplot

[AIRA]

I am a newbie in backtrader When I imported the minute data, the programe show an error AttributeError: 'Plot_OldSync' object has no attribute 'mpyplot' My code is as follows

import datetime
import backtrader as bt 
import backtrader.indicators as btind 
import backtrader.feeds as btfeeds 

class TestStrategy(bt.Strategy):
        pass

cerebro = bt.Cerebro()
data = btfeeds.GenericCSVData(
    dataname='../datas/JD.csv',
    fromdate=datetime.datetime(2014, 1, 1),
    todate=datetime.datetime(2015, 12, 31),
    # nullvalue=0.0,
    # dtformat=('%Y-%m-%d'),
    # tmformat=('%H:%M:%S'),
    # datetime=0,
    # time=1,
    # high=1,
    # low=2,
    # open=3,
    # close=4,
    # volume=5,
    # openinterest=-1
)

cerebro.adddata(data)
cerebro.addstrategy(TestStrategy)
cerebro.run()
cerebro.plot()

if I don’t use parameter below to truncate my csv data, the error will not appear.

fromdate=datetime.datetime(2014, 1, 1),
todate=datetime.datetime(2015, 12, 31)

（The data format is as follows）