Update app3.py

app3.py

@@ -22,7 +22,7 @@ df2['timestamp']=pd.to_datetime(df2['timestamp'])
 df2=pd.melt(df2, id_vars=['president', 'subgroup', 'timestamp'], value_vars=['approve','disapprove']).rename(columns={'variable':'choice', 'value':'rate'})
 
 # Enable Panel extensions
-pn.extension()
+pn.extension('vega')
 
 # Define a function to create and return a plot
 def create_plot(subgroup='All polls', date_range=[df2['timestamp'].min(), df2['timestamp'].max()], moving_av_window=1):