prior commit almost worked and errored out trying to create CSV

app.py

@@ -84,12 +84,12 @@ def generate_caption(processor, model, image):
     return generated_caption
 
 
-# Function to save dataframe results to a CSV file for download
+# Function to save dataframe results to a CSV string for download
 def save_dataframe_to_csv(df):
     csv_buffer = io.StringIO()
     df.to_csv(csv_buffer, index=False)
     csv_string = csv_buffer.getvalue()
-    return csv_string.encode('utf-8')  # Return the CSV contents as bytes
+    return csv_string  # Return the CSV contents as a string
 
 # Main function to perform image captioning and image-text matching
 def process_images_and_statements(image):