Update app.py

app.py

@@ -272,7 +272,7 @@ with gr.Blocks(css=custom_css) as demo:
     with gr.Row():
         submit_button_pdf = gr.Button("ارفع الملف", interactive=False)
     with gr.Row():   
-        chatbot = gr.Chatbot(label="الشات", height=400, rtl=True, show_copy_all_button=True, elem_classes='arabic-chatbox', layout='bubble', scale=1, bubble_full_width=False)
+        chatbot = gr.Chatbot(label="الشات", height=400, rtl=True, show_copy_all_button=True, layout='bubble', scale=1, bubble_full_width=False)
     with gr.Row():
         chat_label = gr.HTML(value='')  
     with gr.Row():