Error in running test case

[Minlei0201]

Hi,
I've finished all setups, but received the following error when running the test case:

scraper.scrape(city_states=['Omaha,NE'],zip_codes=None,sold=True,sale_period='3mo')
KeyError: "['ZIP OR POSTAL CODE'] not found in axis"

I updated the csv file to rename the first column to ZIP OR POSTAL CODE, however the error still persists.

Do you have any idea why it happens?

Thanks,
Laura