AttributeError: ‘DatetimeProperties’ object has no attribute ‘week’

Trying to apply what i learned in tabular data lesson for American Express - Default Prediction kaggle competition.

df = add_datepart(train, ‘S_2’)

returns this error

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
/tmp/ipykernel_33/1522554942.py in <module>
----> 1 df = add_datepart(train, 'S_2')

/opt/conda/lib/python3.7/site-packages/fastai/tabular/core.py in add_datepart(df, field_name, prefix, drop, time)
     31     if time: attr = attr + ['Hour', 'Minute', 'Second']
     32     # Pandas removed `dt.week` in v1.1.10
---> 33     week = field.dt.isocalendar().week.astype(field.dt.day.dtype) if hasattr(field.dt, 'isocalendar') else field.dt.week
     34     for n in attr: df[prefix + n] = getattr(field.dt, n.lower()) if n != 'Week' else week
     35     mask = ~field.isna()

AttributeError: 'DatetimeProperties' object has no attribute 'week'

My notebook.