diff --git a/AIParkingApplication/ApiController.cs b/AIParkingApplication/ApiController.cs
index 2479c28..01aeda1 100644
--- a/AIParkingApplication/ApiController.cs
+++ b/AIParkingApplication/ApiController.cs
@@ -70,7 +70,7 @@ namespace AIParkingApplication
             catch (Exception ex)
             {
                 Console.WriteLine($"GetStatisticInfo Exception:\t{DateTime.Now.GetTimeFormatted()} \t {ex.Message}");
-                return new Statistic.ParkInfo();
+                return null;
             }
         }
 
@@ -87,12 +87,12 @@ namespace AIParkingApplication
                 do
                 {
                     response = await httpClient.PostAsJsonAsync("/api/check-card", request);
+                    response.EnsureSuccessStatusCode();
                     requestCounter += 1;
                     await Task.Delay(100);
                 }
                 while (response.StatusCode != HttpStatusCode.OK && requestCounter < MAX_REQUEST);
 
-                response.EnsureSuccessStatusCode();
                 var cardValication = await response.Content.ReadAsAsync<CardInformation>();
                 return cardValication;
             }
@@ -108,8 +108,8 @@ namespace AIParkingApplication
         {
             string plateImageBase64 = Convert.ToBase64String(plateImage.ToBytes());
             string plateImageResultBase64 = Convert.ToBase64String(plateImageResult.ToBytes());
-            string PlateFrameImageBase64 = Convert.ToBase64String(plateFrameImage.ToBytes());
-            string FrameImageBase64 = Convert.ToBase64String(frameImage.ToBytes());
+            string plateFrameImageBase64 = Convert.ToBase64String(plateFrameImage.ToBytes());
+            string frameImageBase64 = Convert.ToBase64String(frameImage.ToBytes());
             try
             {
                 var request = new SaveLogModel
@@ -123,18 +123,18 @@ namespace AIParkingApplication
                     Timestamp = timestamp,
                     PlateImage = plateImageBase64,
                     PlateResultImage = plateImageResultBase64,
-                    PlateFrameImage = PlateFrameImageBase64,
-                    FrameImage = FrameImageBase64
+                    PlateFrameImage = plateFrameImageBase64,
+                    FrameImage = frameImageBase64
                 };
                 HttpResponseMessage response;
                 int requestCounter = 1;
                 do
                 {
                     response = await httpClient.PostAsJsonAsync("/api/save-logs", request);
+                    response.EnsureSuccessStatusCode();
                     requestCounter += 1;
                     await Task.Delay(100);
                 } while (response.StatusCode != HttpStatusCode.OK && requestCounter < MAX_REQUEST);
-                response.EnsureSuccessStatusCode();
                 SaveLogRespone saveLogRespone = await response.Content.ReadAsAsync<SaveLogRespone>();
                 return saveLogRespone;
             }