web scraping code block not work

[Ye1179]

When I try to download 10-k document in Project5, it seems that the website block such behavior and I can't successfully get the raw_fillings_by_ticker variable.
`raw_fillings_by_ticker = {}

for ticker, data in sec_data.items():
raw_fillings_by_ticker[ticker] = {}
for index_url, file_type, file_date in tqdm(data, desc='Downloading {} Fillings'.format(ticker), unit='filling'):
if (file_type == '10-K'):
file_url = index_url.replace('-index.htm', '.txt').replace('.txtl', '.txt')

        raw_fillings_by_ticker[ticker][file_date] = sec_api.get(file_url)`