Update app.py

app.py

@@ -46,7 +46,7 @@ if uploaded_file is not None:
                            name=series,
                            x=series_train['ds'],
                            y=series_train['y'],
-                           mode='line',
+                           mode='lines',
                            marker=dict(color='blue'),
                            line=dict(width=1),
                            showlegend=True