YahooFinance dataprocessor clean_data() fails

traceback below

./tests/test_finrl_loads.py::test_yahoo_data_processor[ticker_input1-6300] Failed: [undefined]ValueError: Parameter `start` received with timezone defined as 'UTC' although a Date must be timezone naive.
time_interval = '1d', start_date = '2021-01-01', end_date = '2021-10-31'
ticker_input = ['AXP', 'AMGN', 'AAPL', 'BA', 'CAT', 'CSCO', ...]
expected_df_size = 6300
tech_indicator_list = ['macd', 'boll_ub', 'boll_lb', 'rsi_30', 'cci_30', 'dx_30', ...]

@pytest.mark.parametrize(
"ticker_input, expected_df_size",
[(SINGLE_TICKER, 210), (DOW_30_TICKER, 6300)],
)
def test_yahoo_data_processor(
time_interval: str,
start_date: str,
end_date: str,
ticker_input: List[str],
expected_df_size: int,
tech_indicator_list: List[str]
) -> None:
"""
Tests the Yahoo Downloader and the returned data shape
"""
assert isinstance(start_date, str)
assert isinstance(end_date, str)
data_source = "yahoofinance"
dp = DataProcessor(data_source, start_date, end_date, time_interval)
dp.download_data(ticker_input)
assert isinstance(dp.dataframe, pd.DataFrame)
assert dp.dataframe.shape == (
expected_df_size,
9,
) or dp.dataframe.shape == (expected_df_size - 1, 9)
> dp.clean_data()

tests\test_finrl_loads.py:58:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
meta\data_processor.py:91: in clean_data
self.processor.clean_data()
meta\data_processors\yahoofinance.py:87: in clean_data
trading_days = self.get_trading_days(start=self.start_date, end=self.end_date)
meta\data_processors\yahoofinance.py:181: in get_trading_days
df = nyse.sessions_in_range(
C:\Users\eyast\Miniconda3\envs\finrlmeta\lib\site-packages\exchange_calendars\exchange_calendar.py:2170: in sessions_in_range
slc = self._get_sessions_slice(start, end, _parse)
C:\Users\eyast\Miniconda3\envs\finrlmeta\lib\site-packages\exchange_calendars\exchange_calendar.py:2147: in _get_sessions_slice
start, end = self._parse_start_end_dates(start, end, _parse)
C:\Users\eyast\Miniconda3\envs\finrlmeta\lib\site-packages\exchange_calendars\exchange_calendar.py:2143: in _parse_start_end_dates
return parse_date(start, "start", self), parse_date(end, "end", self)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

date = Timestamp('2021-01-01 00:00:00+0000', tz='UTC'), param_name = 'start'
calendar =
raise_oob = True

def parse_date(
date: Date,
param_name: str = "date",
calendar: ExchangeCalendar | None = None,
raise_oob: bool = True,
) -> pd.Timestamp:
"""Parse input intended to represent a date.

Parameters
----------
date
Input to be parsed as date. Must be valid input to pd.Timestamp
and have a time component of 00:00.

param_name
Name of a parameter that was to receive a date.

calendar
ExchangeCalendar against which to evalute out-of-bounds dates.
Only requried if `raise_oob` True.

raise_oob : default: True
True to raise DateOutOfBounds if `date` is earlier than the
first session or later than the last session of `calendar`. NB if
True (default) then `calendar` must be passed.

Returns
-------
pd.Timestamp
pd.Timestamp (timezone naive with time component of 00:00).

Raises
------
Errors as `parse_timestamp` and additionally:

ValueError
If `date` time component is not 00:00.
If `date` is timezone aware.

exchange_calendars.errors.DateOutOfBounds
If `raise_oob` True and `date` parses to a valid timestamp although
timestamp is before `calendar`'s first session or after
`calendar`'s last session.
"""
# side "left" to get it through 'second' handling. Has undesirable effect of
# allowing `date` to be defined with a second (or more accurate) compoment
# if it falls within the minute that follows midnight.
ts = parse_timestamp(date, param_name, raise_oob=False, side="left", utc=False)

if ts.tz is not None:
> raise ValueError(
f"Parameter `{param_name}` received with timezone defined as '{ts.tz.zone}'"
f" although a Date must be timezone naive."
)
E ValueError: Parameter `start` received with timezone defined as 'UTC' although a Date must be timezone naive.

C:\Users\eyast\Miniconda3\envs\finrlmeta\lib\site-packages\exchange_calendars\calendar_helpers.py:378: ValueError