Getting this key error "lastSaleTime"

[ZaifSenpai]

`> python iex.py
Traceback (most recent call last):
File "C:\Python36\lib\site-packages\pandas\core\indexes\base.py", line 2525, in get_loc
return self._engine.get_loc(key)
File "pandas_libs\index.pyx", line 117, in pandas._libs.index.IndexEngine.get_loc
File "pandas_libs\index.pyx", line 139, in pandas._libs.index.IndexEngine.get_loc
File "pandas_libs\hashtable_class_helper.pxi", line 1265, in pandas._libs.hashtable.PyObjectHashTable.get_item
File "pandas_libs\hashtable_class_helper.pxi", line 1273, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'lastSaleTime'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "iex.py", line 211, in
print(iex.get_latest_quote_and_trade(['AA']))
File "iex.py", line 82, in get_latest_quote_and_trade
df['lastSaleTime'] = pd.to_datetime(df['lastSaleTime'], unit='ms')
File "C:\Python36\lib\site-packages\pandas\core\frame.py", line 2139, in getitem
return self._getitem_column(key)
File "C:\Python36\lib\site-packages\pandas\core\frame.py", line 2146, in _getitem_column
return self._get_item_cache(key)
File "C:\Python36\lib\site-packages\pandas\core\generic.py", line 1842, in _get_item_cache
values = self._data.get(item)
File "C:\Python36\lib\site-packages\pandas\core\internals.py", line 3843, in get
loc = self.items.get_loc(item)
File "C:\Python36\lib\site-packages\pandas\core\indexes\base.py", line 2527, in get_loc
return self._engine.get_loc(self._maybe_cast_indexer(key))
File "pandas_libs\index.pyx", line 117, in pandas._libs.index.IndexEngine.get_loc
File "pandas_libs\index.pyx", line 139, in pandas._libs.index.IndexEngine.get_loc
File "pandas_libs\hashtable_class_helper.pxi", line 1265, in pandas._libs.hashtable.PyObjectHashTable.get_item
File "pandas_libs\hashtable_class_helper.pxi", line 1273, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'lastSaleTime'`