Update app.py

app.py

@@ -382,14 +382,14 @@ with gr.Blocks(css_paths="app.css",theme=theme) as demo:
                 title="Session History", 
                 placement="left", 
                 width="900px",
-                className="session-drawer"
+                elem_classes="session-drawer"
             ) as session_drawer:
                 with antd.Flex(vertical=True, gap="middle"):
                     gr.Markdown("### Previous Sessions")
                     session_list = gr.Dropdown(
                         label="Select a session to view history",
                         choices=[],
-                        className="session-list"
+                        elem_classes="session-list"
                     )
                     session_history = legacy.Chatbot(
                         show_label=False,
@@ -399,7 +399,7 @@ with gr.Blocks(css_paths="app.css",theme=theme) as demo:
                     close_btn = antd.Button(
                         "Close",
                         type="default",
-                        className="close-btn"
+                        elem_classes="close-btn"
                     )
 
             # 메인 컨텐츠를 위한 Row