Error message on all radzen pages

I am getting error message on all pages on blazor.radzen.com.
( An error has occurred. This app may no longer respond until reloaded. [Reload])

You might need to hard refresh your browser using CTRL+F5 and/or clear your cache.

I am sorry, but it did not help, I have cleared cache and refresh. It only works on Edge on the computer at work. But neither Edge nor Firefox at home computer.

What is the error message? It is visible from the developer tools.

Source map error: Error: request failed with status 404
URL source: https://blazor.radzen.com/_framework/dotnet.js
URL source map: dotnet.js.map

That shouldn't be causing the problem. Check for other errors please.


This is what is causing the problem for sure. It seems there is some setting which prevents your browser from downloading .dll files.

On the datafilter-odata page, I get this, since this morning:

Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
Unhandled exception rendering component: The JSON value could not be converted to System.Nullable1[System.DateOnly]. Path: $.value[0].Employee.BirthDate | LineNumber: 0 | BytePositionInLine: 928. System.Text.Json.JsonException: The JSON value could not be converted to System.Nullable1[System.DateOnly]. Path: $.value[0].Employee.BirthDate | LineNumber: 0 | BytePositionInLine: 928.
---> System.FormatException: The JSON value is not in a supported DateOnly format.
at System.Text.Json.ThrowHelper.ThrowFormatException(DataType dataType)
at System.Text.Json.Serialization.Converters.DateOnlyConverter.ReadCore(Utf8JsonReader& reader)
at System.Text.Json.Serialization.Converters.DateOnlyConverter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
at System.Text.Json.Serialization.Converters.NullableConverter1[[System.DateOnly, System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options) at System.Text.Json.Serialization.Metadata.JsonPropertyInfo1[[System.Nullable1[[System.DateOnly, System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader) at System.Text.Json.Serialization.Converters.ObjectDefaultConverter1[[RadzenBlazorDemos.Models.Northwind.Employee, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, Employee& value)
at System.Text.Json.Serialization.JsonConverter1[[RadzenBlazorDemos.Models.Northwind.Employee, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, Employee& value, Boolean& isPopulatedValue) at System.Text.Json.Serialization.Metadata.JsonPropertyInfo1[[RadzenBlazorDemos.Models.Northwind.Employee, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
at System.Text.Json.Serialization.Converters.ObjectDefaultConverter1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, Order& value) at System.Text.Json.Serialization.JsonConverter1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, Order& value, Boolean& isPopulatedValue)
at System.Text.Json.Serialization.JsonCollectionConverter2[[System.Collections.Generic.IEnumerable1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, IEnumerable1& value) at System.Text.Json.Serialization.JsonConverter1[[System.Collections.Generic.IEnumerable1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, IEnumerable1& value, Boolean& isPopulatedValue)
at System.Text.Json.Serialization.Metadata.JsonPropertyInfo1[[System.Collections.Generic.IEnumerable1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
at System.Text.Json.Serialization.Converters.ObjectDefaultConverter1[[Radzen.ODataServiceResult1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Radzen.Blazor, Version=4.32.5.0, Culture=neutral, PublicKeyToken=null]].OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, ODataServiceResult1& value) at System.Text.Json.Serialization.JsonConverter1[[Radzen.ODataServiceResult1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Radzen.Blazor, Version=4.32.5.0, Culture=neutral, PublicKeyToken=null]].TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, ODataServiceResult1& value, Boolean& isPopulatedValue)
at System.Text.Json.Serialization.JsonConverter1[[Radzen.ODataServiceResult1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Radzen.Blazor, Version=4.32.5.0, Culture=neutral, PublicKeyToken=null]].ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
--- End of inner exception stack trace ---
at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, Utf8JsonReader& reader, Exception ex)
at System.Text.Json.Serialization.JsonConverter1[[Radzen.ODataServiceResult1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Radzen.Blazor, Version=4.32.5.0, Culture=neutral, PublicKeyToken=null]].ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
at System.Text.Json.Serialization.Metadata.JsonTypeInfo1[[Radzen.ODataServiceResult1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Radzen.Blazor, Version=4.32.5.0, Culture=neutral, PublicKeyToken=null]].ContinueDeserialize(ReadBufferState& bufferState, JsonReaderState& jsonReaderState, ReadStack& readStack)
at System.Text.Json.Serialization.Metadata.JsonTypeInfo1.<DeserializeAsync>d__1[[Radzen.ODataServiceResult1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Radzen.Blazor, Version=4.32.5.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
at Radzen.HttpResponseMessageExtensions.d__01[[Radzen.ODataServiceResult1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Radzen.Blazor, Version=4.32.5.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
at Radzen.HttpResponseMessageExtensions.d__01[[Radzen.ODataServiceResult1[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Radzen.Blazor, Version=4.32.5.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
at RadzenBlazorDemos.NorthwindODataService.GetOrders(String filter, Nullable1 top, Nullable1 skip, String orderby, String expand, String select, Nullable1 count) at RadzenBlazorDemos.Pages.DataFilterOData.LoadData(LoadDataArgs args) at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task) at Radzen.Blazor.RadzenDataGrid1.d__498[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
at Radzen.Blazor.RadzenDataGrid1.<ReloadInternal>d__496[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext() at Radzen.Blazor.RadzenDataGrid1.d__495[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
at Radzen.PagedDataBoundComponent1.<ReloadOnFirstRender>d__131[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext() at Radzen.Blazor.RadzenDataGrid1.d__531[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
at Radzen.PagedDataBoundComponent1.<OnAfterRenderAsync>d__130[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext() at Radzen.Blazor.RadzenDataGrid1.d__532[[RadzenBlazorDemos.Models.Northwind.Order, RadzenBlazorDemos, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)

Thanks, I'll look into that

I found out this.
In firefox, error appears


In Edge it is withou error, it works

It doesn't work at home and it looks like firefox at work in both browsers.

Solution in Firefox:
go to .. about:config (write it in line)
find accessibility.blockautorefresh and switch it from false to true

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