diff --git a/WotBlitzStatisticsPro.Blazor.Tests/Services/GraphQlBackendServiceTests.cs b/WotBlitzStatisticsPro.Blazor.Tests/Services/GraphQlBackendServiceTests.cs
index 5d7392d..64b711e 100644
--- a/WotBlitzStatisticsPro.Blazor.Tests/Services/GraphQlBackendServiceTests.cs
+++ b/WotBlitzStatisticsPro.Blazor.Tests/Services/GraphQlBackendServiceTests.cs
@@ -92,7 +92,7 @@ namespace WotBlitzStatisticsPro.Blazor.Tests.Services
             players.Should().NotBeNull();
             players.Should().NotBeEmpty();
             _findPlayersQueryMock.Verify(q => q.ExecuteAsync(expectedSearch, expectedRealm, It.IsAny<RequestLanguage>(), It.IsAny<CancellationToken>()), Times.Once);
-            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
         }
 
         [Test]
@@ -107,7 +107,7 @@ namespace WotBlitzStatisticsPro.Blazor.Tests.Services
 
             players.Should().BeNull();
             _findPlayersQueryMock.Verify(q => q.ExecuteAsync(expectedSearch, expectedRealm, It.IsAny<RequestLanguage>(), It.IsAny<CancellationToken>()), Times.Once);
-            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
         }
 
 
@@ -123,7 +123,7 @@ namespace WotBlitzStatisticsPro.Blazor.Tests.Services
             clans.Should().NotBeNull();
             clans.Should().NotBeEmpty();
             _findClanQueryMock.Verify(q => q.ExecuteAsync(expectedSearch, expectedRealm, It.IsAny<RequestLanguage>(), It.IsAny<CancellationToken>()), Times.Once);
-            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
 
         }
 
@@ -139,7 +139,7 @@ namespace WotBlitzStatisticsPro.Blazor.Tests.Services
 
             players.Should().BeNull();
             _findClanQueryMock.Verify(q => q.ExecuteAsync(expectedSearch, expectedRealm, It.IsAny<RequestLanguage>(), It.IsAny<CancellationToken>()), Times.Once);
-            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
         }
 
         [Test]
@@ -156,7 +156,7 @@ namespace WotBlitzStatisticsPro.Blazor.Tests.Services
             playerInfoResponse.achievementsBySection.Should().NotBeEmpty();
 
             _playerQueryMock.Verify(q => q.ExecuteAsync(CurrentAccountId, expectedRealm, It.IsAny<RequestLanguage>(), It.IsAny<CancellationToken>()), Times.Once);
-            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Never);
         }
 
         [Test]
@@ -172,7 +172,7 @@ namespace WotBlitzStatisticsPro.Blazor.Tests.Services
             playerInfoResponse.achievementsBySection.Should().BeNull();
 
             _playerQueryMock.Verify(q => q.ExecuteAsync(CurrentAccountId, expectedRealm, It.IsAny<RequestLanguage>(), It.IsAny<CancellationToken>()), Times.Once);
-            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+            _notificationServiceMock.Verify(n => n.ReportError(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>()), Times.Once);
         }
 
         private async Task SetUpFindPlayers()
diff --git a/WotBlitzStatisticsPro.Blazor/Pages/PlayerInfoLayoutBase.cs b/WotBlitzStatisticsPro.Blazor/Pages/PlayerInfoLayoutBase.cs
index 9fe4ff3..4fa15ef 100644
--- a/WotBlitzStatisticsPro.Blazor/Pages/PlayerInfoLayoutBase.cs
+++ b/WotBlitzStatisticsPro.Blazor/Pages/PlayerInfoLayoutBase.cs
@@ -57,7 +57,7 @@ namespace WotBlitzStatisticsPro.Blazor.Pages
             }
             catch (System.Exception e)
             {
-                Notifications.ReportError("Can not get data from backend", e.Message);
+                Notifications.ReportError("Can not get data from backend", e.Message, e.StackTrace);
             }
         }
     }
diff --git a/WotBlitzStatisticsPro.Blazor/Pages/PlayerInfoTanksTreeBase.cs b/WotBlitzStatisticsPro.Blazor/Pages/PlayerInfoTanksTreeBase.cs
index bf3be93..32b0cc3 100644
--- a/WotBlitzStatisticsPro.Blazor/Pages/PlayerInfoTanksTreeBase.cs
+++ b/WotBlitzStatisticsPro.Blazor/Pages/PlayerInfoTanksTreeBase.cs
@@ -76,7 +76,7 @@ namespace WotBlitzStatisticsPro.Blazor.Pages
         {
             TreeItems.Clear();
             Connections.Clear();
-            var vehiclesTree = VehiclesLibrary.Where(v => v.IsPremium == false).ToList();
+            var vehiclesTree = VehiclesLibrary?.Where(v => v != null && v.IsPremium == false).ToList();
             for (int tier = 1; tier < 11; tier++)
             {
                 var vehiclesByTier = vehiclesTree.Where(v => v.Tier == tier).ToList();
@@ -279,7 +279,7 @@ namespace WotBlitzStatisticsPro.Blazor.Pages
             }
             catch (System.Exception e)
             {
-                Notifications.ReportError("Can not get data from backend", e.Message);
+                Notifications.ReportError("Can not get data from backend", e.Message, e.StackTrace);
             }
 
         }
diff --git a/WotBlitzStatisticsPro.Blazor/Services/GraphQlBackendService.cs b/WotBlitzStatisticsPro.Blazor/Services/GraphQlBackendService.cs
index 0207389..6270a51 100644
--- a/WotBlitzStatisticsPro.Blazor/Services/GraphQlBackendService.cs
+++ b/WotBlitzStatisticsPro.Blazor/Services/GraphQlBackendService.cs
@@ -132,6 +132,10 @@ namespace WotBlitzStatisticsPro.Blazor.Services
                                 {
                                     messages.Add(message.ToString());
                                 }
+                                else
+                                {
+                                    messages.Add(realError);
+                                }
                             }
                         }
                     }   
@@ -140,7 +144,7 @@ namespace WotBlitzStatisticsPro.Blazor.Services
 
             if (messages.Count > 0)
             {
-                _notificationsService.ReportError("Backend error",string.Join(";", messages));
+                _notificationsService.ReportError("Backend error",string.Join(";", messages), null);
             }
         }
     }
diff --git a/WotBlitzStatisticsPro.Blazor/Services/INotificationsService.cs b/WotBlitzStatisticsPro.Blazor/Services/INotificationsService.cs
index 54cfceb..773249d 100644
--- a/WotBlitzStatisticsPro.Blazor/Services/INotificationsService.cs
+++ b/WotBlitzStatisticsPro.Blazor/Services/INotificationsService.cs
@@ -14,6 +14,6 @@ namespace WotBlitzStatisticsPro.Blazor.Services
 
         void ReportInfo(string summary, string message);
         void ReportWarning(string summary, string message);
-        void ReportError(string summary, string message);
+        void ReportError(string summary, string message, string? stacktrace);
     }
 }
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Blazor/Services/NotificationsService.cs b/WotBlitzStatisticsPro.Blazor/Services/NotificationsService.cs
index 0bbfae5..0dfde7e 100644
--- a/WotBlitzStatisticsPro.Blazor/Services/NotificationsService.cs
+++ b/WotBlitzStatisticsPro.Blazor/Services/NotificationsService.cs
@@ -39,13 +39,14 @@ namespace WotBlitzStatisticsPro.Blazor.Services
             _jsRuntime.InvokeVoidAsync("console.warn", summary, message);
         }
 
-        public void ReportError(string summary, string message)
+        public void ReportError(string summary, string message, string? stacktrace)
         {
             Type = NotificationType.Error;
             Message = message;
             Summary = summary;
             MessageArrived?.Invoke();
-            _jsRuntime.InvokeVoidAsync("console.error", summary, message);
+            Console.WriteLine(message);
+            _jsRuntime.InvokeVoidAsync("console.error", summary, string.IsNullOrEmpty(stacktrace) ? message : $"{message}; {stacktrace}");
         }
     }
 }
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Logic/Mappers/VehicleDictionaryProfile.cs b/WotBlitzStatisticsPro.Logic/Mappers/VehicleDictionaryProfile.cs
index 534d295..90b9b61 100644
--- a/WotBlitzStatisticsPro.Logic/Mappers/VehicleDictionaryProfile.cs
+++ b/WotBlitzStatisticsPro.Logic/Mappers/VehicleDictionaryProfile.cs
@@ -42,10 +42,10 @@ namespace WotBlitzStatisticsPro.Logic.Mappers
             CreateMap<IVehiclesDictionary, VehicleResponse>()
                 .ForMember(v => v.Name,
                     o => o.MapFrom((src, dest, destMember, context) =>
-                            src.Name.FirstOrDefault(l => l.Language == (RequestLanguage) context.Items["language"])?.Value))
+                            src.Name.FirstOrDefault(l => l.Language == (RequestLanguage) context.Items["language"])?.Value ?? string.Empty))
                 .ForMember(v => v.Description,
                     o => o.MapFrom((src, dest, destMember, context) =>
-                            src.Description.FirstOrDefault(l => l.Language == (RequestLanguage) context.Items["language"])?.Value))
+                            src.Description.FirstOrDefault(l => l.Language == (RequestLanguage) context.Items["language"])?.Value ?? string.Empty))
                 .ForMember(v => v.NexTanksInTree,
                     o => o.MapFrom(src => src.NexTanksInTree.Select(t => t.TankId).ToList()))
             ;