i made a small mistake, it isn't effecting the recipe but..
Code:
def absurl(url):
if url.startswith('/'):
url = 'https://www.hbr.org/' + url
return url
hbr.org isnt supposed to be ending in '/'..
its creating double slashes in absurl links.
its supposed to be url = 'https://www.hbr.org' + url