Update app.py

app.py

@@ -200,10 +200,10 @@ with gr.Blocks(theme=MPGPoster()) as demo:
         with gr.Column(scale=1):
             gr.Markdown("## Navigation")
             sections = ["Introduction", "Method", "Demo", "Conclusion"]
-            section_buttons = [gr.Button(section) for section in sections]
+            section_buttons = [gr.Button(value=section) for section in sections]
             
             for button, section in zip(section_buttons, sections):
-                button.click(fn=update_content, inputs=gr.Button(label=section), outputs=content)
+                button.click(fn=update_content, inputs=section, outputs=content)
         
         with gr.Column(scale=4):
             content