Update app.py

app.py

@@ -42,7 +42,7 @@ def get_csv_file(csv_file):
     temp_filepath = os.path.join(temp_dir.name, csv_file.name)
     with open(temp_filepath, "w", encoding="utf-8") as csvfile:
         csvfile.write(csv_file.getvalue().decode('utf-8'))
-    csv_loader = CSVLoader(temp_filepath, text_column.name)
+    csv_loader = CSVLoader(temp_filepath, text_file.name)
     csv_data = csv_loader.load()
     return csv_data