Failed Jobs

Enqueued 0 / 0 Scheduled 0 Processing 0 Succeeded 280,972 Failed 29,542 Deleted 203 Awaiting 0

Failed jobs do not become expired to allow you to re-queue them without any time pressure. You should re-queue or delete them manually, or apply AutomaticRetry(OnAttemptsExceeded = AttemptsExceededAction.Delete) attribute to delete them automatically.

Id	Job	Failed
#142756	ProductionForecastService.ForecastGeneration An exception occurred during performance of the job. Fewer details...	01/21/2026 02:32:03
#142756	System.InvalidOperationException Sequence contains no matching element System.InvalidOperationException: Sequence contains no matching element at System.Linq.ThrowHelper.ThrowNoMatchException() at EnergyDataHub.Data.Services.XProductionForecastStorageService.SaveProductionForecast(List`1 forecasts, Location location, ForecastLocationSettings forecastSettings) at EnergyDataHub.Data.Services.ProductionForecastService.Forecast(Location location, IPredictionInput weatherForecastDto, ForecastLocationSettings forecastSettings, IProductionForecastStorageService storageService) at EnergyDataHub.Data.Services.ProductionForecastService.ForecastGeneration(Location location, XWeatherResponse weatherForecastDto, ForecastLocationSettings forecastSettings) at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142755	ProductionForecastService.ForecastGeneration An exception occurred during performance of the job. More details...	01/21/2026 02:31:56
#142755	System.InvalidOperationException Sequence contains no matching element System.InvalidOperationException: Sequence contains no matching element at System.Linq.ThrowHelper.ThrowNoMatchException() at EnergyDataHub.Data.Services.XProductionForecastStorageService.SaveProductionForecast(List`1 forecasts, Location location, ForecastLocationSettings forecastSettings) at EnergyDataHub.Data.Services.ProductionForecastService.Forecast(Location location, IPredictionInput weatherForecastDto, ForecastLocationSettings forecastSettings, IProductionForecastStorageService storageService) at EnergyDataHub.Data.Services.ProductionForecastService.ForecastGeneration(Location location, XWeatherResponse weatherForecastDto, ForecastLocationSettings forecastSettings) at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142749	IXWeatherSyncJob.Run An exception occurred during performance of the job. More details...	01/21/2026 02:24:01
#142749	Newtonsoft.Json.JsonSerializationException Error converting value {null} to type 'System.Double'. Path 'response[0].periods[9].maxFeelslikeC', line 1, position 20157. Newtonsoft.Json.JsonSerializationException: Error converting value {null} to type 'System.Double'. Path 'response[0].periods[9].maxFeelslikeC', line 1, position 20157. ---> System.InvalidCastException: Null object cannot be converted to a value type. at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType(JsonReader reader, Object value, CultureInfo culture, JsonContract contract, Type targetType) --- End of inner exception stack trace --- at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType(JsonReader reader, Object value, CultureInfo culture, JsonContract contract, Type targetType) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList(IList list, JsonReader reader, JsonArrayContract contract, JsonProperty containerProperty, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList(IList list, JsonReader reader, JsonArrayContract contract, JsonProperty containerProperty, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) at EnergyDataHub.Data.Services.XWeatherClient.FetchData(NameValueCollection queryParams, String path) at EnergyDataHub.Data.Services.XWeatherClient.GetWeatherForcasts(Double latitude, Double longitude, Nullable`1 start, XWeatherInterval inteval, Int32 periodCount) at EnergyDataHub.Data.Hangfire.Jobs.XWeatherSyncJob.SyncLocationWeatherData(Location location, DataSource dataSource, DateTime taskStartHour) at EnergyDataHub.Data.Hangfire.Jobs.XWeatherSyncJob.Run() at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142725	IXWeatherSyncJob.Run An exception occurred during performance of the job. More details...	01/21/2026 00:48:48
#142725	Newtonsoft.Json.JsonSerializationException Error converting value {null} to type 'System.Double'. Path 'response[0].periods[11].maxFeelslikeC', line 1, position 24609. Newtonsoft.Json.JsonSerializationException: Error converting value {null} to type 'System.Double'. Path 'response[0].periods[11].maxFeelslikeC', line 1, position 24609. ---> System.InvalidCastException: Null object cannot be converted to a value type. at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType(JsonReader reader, Object value, CultureInfo culture, JsonContract contract, Type targetType) --- End of inner exception stack trace --- at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType(JsonReader reader, Object value, CultureInfo culture, JsonContract contract, Type targetType) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList(IList list, JsonReader reader, JsonArrayContract contract, JsonProperty containerProperty, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList(IList list, JsonReader reader, JsonArrayContract contract, JsonProperty containerProperty, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) at EnergyDataHub.Data.Services.XWeatherClient.FetchData(NameValueCollection queryParams, String path) at EnergyDataHub.Data.Services.XWeatherClient.GetWeatherForcasts(Double latitude, Double longitude, Nullable`1 start, XWeatherInterval inteval, Int32 periodCount) at EnergyDataHub.Data.Hangfire.Jobs.XWeatherSyncJob.SyncLocationWeatherData(Location location, DataSource dataSource, DateTime taskStartHour) at EnergyDataHub.Data.Hangfire.Jobs.XWeatherSyncJob.Run() at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142722	IVisualCrossingSyncJob.Run An exception occurred during performance of the job. More details...	01/21/2026 00:45:37
#142722	System.Net.Http.HttpRequestException Response status code does not indicate success: 401. System.Net.Http.HttpRequestException: Response status code does not indicate success: 401. at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode() at System.Net.Http.HttpClient.GetStringAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken) at EnergyDataHub.Data.Services.VisualCrossingClient.FetchWeatherData(String path, VisualCrossingRequestOptions options) at EnergyDataHub.Data.Services.VisualCrossingClient.GetWeatherData(Double latitude, Double longitude, DateOnly start, DateOnly end, VisualCrossingRequestOptions options) at EnergyDataHub.Data.Hangfire.Jobs.VisualCrossingSyncJob.SyncLocationWeatherData(Location location, DataSource dataSource, DateTime taskStartHour) at EnergyDataHub.Data.Hangfire.Jobs.VisualCrossingSyncJob.Run() at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142706	ProductionForecastService.ForecastGeneration An exception occurred during performance of the job. More details...	01/21/2026 00:32:54
#142706	System.InvalidOperationException Sequence contains no matching element System.InvalidOperationException: Sequence contains no matching element at System.Linq.ThrowHelper.ThrowNoMatchException() at EnergyDataHub.Data.Services.XProductionForecastStorageService.SaveProductionForecast(List`1 forecasts, Location location, ForecastLocationSettings forecastSettings) at EnergyDataHub.Data.Services.ProductionForecastService.Forecast(Location location, IPredictionInput weatherForecastDto, ForecastLocationSettings forecastSettings, IProductionForecastStorageService storageService) at EnergyDataHub.Data.Services.ProductionForecastService.ForecastGeneration(Location location, XWeatherResponse weatherForecastDto, ForecastLocationSettings forecastSettings) at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142704	ProductionForecastService.ForecastGeneration An exception occurred during performance of the job. More details...	01/21/2026 00:32:47
#142704	System.InvalidOperationException Sequence contains no matching element System.InvalidOperationException: Sequence contains no matching element at System.Linq.ThrowHelper.ThrowNoMatchException() at EnergyDataHub.Data.Services.XProductionForecastStorageService.SaveProductionForecast(List`1 forecasts, Location location, ForecastLocationSettings forecastSettings) at EnergyDataHub.Data.Services.ProductionForecastService.Forecast(Location location, IPredictionInput weatherForecastDto, ForecastLocationSettings forecastSettings, IProductionForecastStorageService storageService) at EnergyDataHub.Data.Services.ProductionForecastService.ForecastGeneration(Location location, XWeatherResponse weatherForecastDto, ForecastLocationSettings forecastSettings) at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142703	ProductionForecastService.ForecastGeneration An exception occurred during performance of the job. More details...	01/21/2026 00:32:40
#142703	System.InvalidOperationException Sequence contains no matching element System.InvalidOperationException: Sequence contains no matching element at System.Linq.ThrowHelper.ThrowNoMatchException() at EnergyDataHub.Data.Services.XProductionForecastStorageService.SaveProductionForecast(List`1 forecasts, Location location, ForecastLocationSettings forecastSettings) at EnergyDataHub.Data.Services.ProductionForecastService.Forecast(Location location, IPredictionInput weatherForecastDto, ForecastLocationSettings forecastSettings, IProductionForecastStorageService storageService) at EnergyDataHub.Data.Services.ProductionForecastService.ForecastGeneration(Location location, XWeatherResponse weatherForecastDto, ForecastLocationSettings forecastSettings) at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142697	IXWeatherSyncJob.Run An exception occurred during performance of the job. More details...	01/21/2026 00:23:23
#142697	Newtonsoft.Json.JsonSerializationException Error converting value {null} to type 'System.Double'. Path 'response[0].periods[11].maxFeelslikeC', line 1, position 24609. Newtonsoft.Json.JsonSerializationException: Error converting value {null} to type 'System.Double'. Path 'response[0].periods[11].maxFeelslikeC', line 1, position 24609. ---> System.InvalidCastException: Null object cannot be converted to a value type. at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType(JsonReader reader, Object value, CultureInfo culture, JsonContract contract, Type targetType) --- End of inner exception stack trace --- at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType(JsonReader reader, Object value, CultureInfo culture, JsonContract contract, Type targetType) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList(IList list, JsonReader reader, JsonArrayContract contract, JsonProperty containerProperty, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList(IList list, JsonReader reader, JsonArrayContract contract, JsonProperty containerProperty, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) at EnergyDataHub.Data.Services.XWeatherClient.FetchData(NameValueCollection queryParams, String path) at EnergyDataHub.Data.Services.XWeatherClient.GetWeatherForcasts(Double latitude, Double longitude, Nullable`1 start, XWeatherInterval inteval, Int32 periodCount) at EnergyDataHub.Data.Hangfire.Jobs.XWeatherSyncJob.SyncLocationWeatherData(Location location, DataSource dataSource, DateTime taskStartHour) at EnergyDataHub.Data.Hangfire.Jobs.XWeatherSyncJob.Run() at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
#142687	ProductionForecastService.ForecastGeneration An exception occurred during performance of the job. More details...	01/21/2026 00:19:21
#142687	System.InvalidOperationException Sequence contains no matching element System.InvalidOperationException: Sequence contains no matching element at System.Linq.ThrowHelper.ThrowNoMatchException() at EnergyDataHub.Data.Services.XProductionForecastStorageService.SaveProductionForecast(List`1 forecasts, Location location, ForecastLocationSettings forecastSettings) at EnergyDataHub.Data.Services.ProductionForecastService.Forecast(Location location, IPredictionInput weatherForecastDto, ForecastLocationSettings forecastSettings, IProductionForecastStorageService storageService) at EnergyDataHub.Data.Services.ProductionForecastService.ForecastGeneration(Location location, XWeatherResponse weatherForecastDto, ForecastLocationSettings forecastSettings) at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*) at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

System.InvalidOperationException

System.InvalidOperationException

Newtonsoft.Json.JsonSerializationException

Newtonsoft.Json.JsonSerializationException

System.Net.Http.HttpRequestException

System.InvalidOperationException

System.InvalidOperationException

System.InvalidOperationException

Newtonsoft.Json.JsonSerializationException

System.InvalidOperationException