Traceback (most recent call last):
File "exercise.py", line 24, in <module>
dump_to_path(out_path='data', format='json')
...
File "/home/zelima/anaconda3/envs/dataflows/lib/python3.7/site-packages/dataflows/processors/dumpers/file_formats.py", line 30, in __init__
self.headers = [f.name for f in schema.fields]
AttributeError: 'NoneType' object has no attribute 'fields'