diff --git a/TeslaLogger/WebHelper.cs b/TeslaLogger/WebHelper.cs
index 3b085c623..19d5000ce 100644
--- a/TeslaLogger/WebHelper.cs
+++ b/TeslaLogger/WebHelper.cs
@@ -5019,6 +5019,7 @@ public async Task<byte[]> GetChargingHistoryInvoicePDF(string contentId)
 
                     if (!result.IsSuccessStatusCode)
                     {
+                        PDF = null;
                         throw new Exception("GetChargingHistoryInvoicePDF: " + result.StatusCode.ToString() + " CarState: " + car.GetCurrentState().ToString() + " (OK: " + car.webhelper.getChargingHistoryV2OK + " - Fail: " + car.webhelper.getChargingHistoryV2Fail + ")");
                     }
                     return PDF;