Getting this error in AutoGrader after Submitting Assignment.
“There was a problem compiling the code from your notebook. Details:
name ‘tokenizer’ is not defined.”
Despite all my unittests passing, I am getting a 0/100.
Is there any chance the notebook name is not the official given by Coursera? Or maybe you have an old version of the notebook, there is lab reset option that you can use if any of these has happened!
I tried resetting the lab and running the code again. Didn’t work. 
Send me the lab code in private let me have a look when I get the chance!