you can paste the error here rather than sending DM.
According to most recent you have used vectorizer.adapt to the dataset code which is an incorrect code.
vectorizer.adapt is suppose to be used in the previous grade cell.
Not defined error is coming because you are using a function recall incorrect as it was not recalled as label but labels.
Being said that your below code still incorrect.
dataset = dataset.map(lambda text, label : text_vectorizer.adapt(text), label_encoder.adapt(label))
20 #text_vectorizer.adapt(dataset.map(lambda text, label: text))
21 #label_encoder.adapt(dataset.map(lambda text, label: label))
you only need to use lambda: and then mentions text with its recalled function to text_,vectorizer and same for labels is label_encoder
if using this threw an error IOPub rate limit error that means your previous grade cells are incorrect.
You can DM me that code cell by personal DM and also send how you corrected the preprocess codes.
The reason I ask for screenshot of error or codes is not for my benefit as minor syntax error gets missed with copy paste and learners end up finding what is the issue which happened when I was addressing issue for another learner that he had missed ) in his codes.