fix errors

app.py

@@ -86,7 +86,11 @@ with gr.Blocks() as demo:
             op_level = gr.Label(
                 num_top_classes=9, label="Predicted author of opinion"
             )
-            output_textbox = gr.Textbox(label="Output Text", show_copy_button=True)
+            output_textbox = gr.Textbox(
+                                    label="Output Text",
+                                    buttons=["copy"],  # shows a copy button
+                            )
+
             info_textbox = gr.Textbox(
                 value=paragraph_text,
                 label="Additional Insights",