Rebuilding clasifier issue

I am trying to rebuild the classifier but I face

MissingSchema: Invalid URL 'None': No schema supplied. Perhaps you meant [http://None](http://none/)?

I have tried to search for things other than beards to make a classifier but whenever I enter a keyword search the problem is still.I have removed this line since I think it i useless.

ims = ['']

I know the problem but don’t know how to solve.The problem is there is no location for the downloaded url.

ims = results.attrgot(‘content_url’)

content url which was used in the lecture is an empty list in the notebook I am working on.21