Update app.py

app.py

@@ -376,8 +376,8 @@ def update_main_content(data):
     if not data or "data_df" not in data or len(data["data_df"]) == 0:
         return html.Div([
             html.Div("📊", style={"fontSize": "3rem", "marginBottom": "20px"}),
-            html.H3("No Data Available", style={"color": "#666", "marginBottom": "10px"}),
-            html.P("Please click the 'Load Data' button above to get data.", 
+            html.H3("Please click the 'Load Data' button above to get data.", style={"color": "#666", "marginBottom": "10px"}),
+            html.P("Loading may take a few seconds. If the data does not appear, please click ‘Load Data’ again.", 
                    style={"color": "#888", "fontSize": "1rem"})
         ], style={
             "textAlign": "center",