NameError: name 'tweets_porcessed' is not defined

Hi !
First thank you for your tutorial and taking time for sharing it !

I'm trying to reproduce your code, but I'm facing an error and can't fix it, just before the sentimental analysis I'm trying to run ' ```# Fit and transform the vectorizer
tfidf_matrix = vectorizer.fit_transform(tweets_porcessed["Processed"])```

and get this error =>

```
7 # Fit and transform the vectorizer
----> 8 tfidf_matrix = vectorizer.fit_transform(tweets_porcessed["Processed"])
9
10 # Let's see what we have

NameError: name 'tweets_porcessed' is not defined
```

Can you help to fix it please ?

Locate the Jupyter Notebook cell containing the `vectorizer.fit_transform(tweets_porcessed["Processed"])` call and inspect the preceding cells for the variable definition and spelling. Rerun the notebook through the vectorization step and confirm that the NameError is gone before continuing to the sentiment-analysis section.

Written by the indexing model from the issue text.