backtest_plot() have internal problem associated with pandas version

[XJTLUmedia]

Describe the bug A clear and concise description of what the bug is.

from finrl.plot import backtest_stats, backtest_plot, get_daily_return, get_baseline

print("==============Compare to DJIA===========")
%matplotlib inline
# S&P 500: ^GSPC
# Dow Jones Index: ^DJI
# NASDAQ 100: ^NDX
backtest_plot(df_account_value, 
              baseline_ticker = '^DJI', 
              baseline_start = df_account_value.loc[0,'date'],
              baseline_end = df_account_value.loc[len(df_account_value)-1,'date'])

To Reproduce Steps to reproduce the behavior:

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2. Click on '....'
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4. See error

the backtest_plot got error when running on google colab

Expected behavior No error should be happened, it should not conflict with pandas version

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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[XJTLUmedia]

I saw it get fixed. Sorry for bothering. Nvm