KeyError: 'Data'

[ghost]

Traceback (most recent call last):
File "main.py", line 34, in
main()
File "main.py", line 30, in main
stockh.run()
File " stockholm/stockholm/stockholm.py", line 671, in run
self.data_test(self.target_date, self.test_date_range, output_types)
File " stockholm/stockholm/stockholm.py", line 647, in data_test
is_date_valid = self.check_date(all_quotes, date)
File " stockholm/stockholm/stockholm.py", line 471, in check_date
for quote_data in quote['Data']:
KeyError: 'Data'