update app.py

app.py

@@ -236,8 +236,8 @@ if file_upload:
 
             
     # Loop through the selected frequency and increment the date
-    while current_date <= end_date:
-        current_date_str = current_date.strftime('%Y-%m-%d')
+    while start_date <= end_date:
+        start_date_str = start_date.strftime('%Y-%m-%d')
         
     # Store results with dates for aggregation
     results_with_dates = []