Update utils.py

utils.py

@@ -214,6 +214,7 @@ def fetch_news_data(company_name: str, article_number: int):
 
     # remove unwanted unicode characters (like \u2018, \u2019, etc.)
     unicode_patterns = re.compile(r'[\u2018\u2019\u2020\u2021\u2014]')  # Add more if needed
+    df['article_text'] = df['article_text'].fillna('').astype(str)
     df['article_text'] = df['article_text'].apply(lambda x: unicode_patterns.sub('', x))
 
     custom_stop_words = list(custom_stop_words)