Fix app

app.py

@@ -237,8 +237,8 @@ if (st.session_state.uploaded):
   )
 
   if (forecast_button):
-    df_csv = df.to_csv()
-    df = pd.read_csv(df_csv, index_col = 'Date', parse_dates= True)
+    data_csv = df.to_csv(index=False, header=True, path_or_buf=None)
+    df = pd.read_csv(data_csv, index_col = 'Date', parse_dates= True)
     df = df.dropna()
 
     # Create the eXogenous values