webfrontend Errors

[SamLee-skillable]

Web app no longer functioning for me. Unsure when it was last working. I last ran it months ago.
When running it locally, webfrontend runs into errors and is unusable.

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Console error

blazor.server.js:1 [2025-10-14T19:43:25.966Z] Information: Normalizing '_blazor' to 'http://localhost:8100/_blazor'.
blazor.server.js:1 [2025-10-14T19:43:26.004Z] Information: WebSocket connected to ws://localhost:8100/_blazor?id=5bkAoTpm-zZg8xwPOUtg_g.
blazor.server.js:1 [2025-10-14T19:43:44.418Z] Error: System.Text.Json.JsonException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. Path: $ | LineNumber: 0 | BytePositionInLine: 0.
---> System.Text.Json.JsonReaderException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. LineNumber: 0 | BytePositionInLine: 0.
at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan1 bytes) at System.Text.Json.Utf8JsonReader.Read() at System.Text.Json.Serialization.JsonConverter1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
--- End of inner exception stack trace ---
at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, JsonReaderException ex)
at System.Text.Json.Serialization.JsonConverter1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state) at System.Text.Json.Serialization.Metadata.JsonTypeInfo1.Deserialize(Utf8JsonReader& reader, ReadStack& state)
at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan1 utf8Json, JsonTypeInfo1 jsonTypeInfo, Nullable1 actualByteCount) at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan1 json, JsonTypeInfo`1 jsonTypeInfo)
at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
at Cosmos.Copilot.Services.SemanticKernelService.LoadProductDataAsync() in C:\Users\Admin\Repos\cosmosdb-nosql-copilot\src\cosmos-copilot.WebApp\Services\SemanticKernelService.cs:line 260
at Cosmos.Copilot.Services.ChatService.InitializeAsync() in C:\Users\Admin\Repos\cosmosdb-nosql-copilot\src\cosmos-copilot.WebApp\Services\ChatService.cs:line 120
at Cosmos.Copilot.Pages.ChatPane.OnInitializedAsync() in C:\Users\Admin\Repos\cosmosdb-nosql-copilot\src\cosmos-copilot.WebApp\Pages\ChatPane.razor:line 285
at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)
log @ blazor.server.js:1
blazor.server.js:1 [2025-10-14T19:43:44.419Z] Information: Connection disconnected.

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Error in Structured logs

False MSAL 4.65.0.0 MSAL.NetCore .NET 8.0.4 Microsoft Windows 10.0.22621 [2025-10-08 20:03:53Z - a6ddc548-2b3a-4862-add5-9742e3c66a7f] Exception type: Azure.Identity.CredentialUnavailableException
---> Inner Exception Details
Exception type: Azure.RequestFailedException
---> Inner Exception Details
Exception type: System.Net.Http.HttpRequestException
---> Inner Exception Details
Exception type: System.Net.Sockets.SocketException
To see full exception details, enable PII Logging. See https://aka.ms/msal-net-logging
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
at System.Net.Sockets.Socket.g__WaitForConnectWithCancellation|285_0(AwaitableSocketAsyncEventArgs saea, ValueTask connectTask, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.ConnectToTcpHostAsync(String host, Int32 port, HttpRequestMessage initialRequest, Boolean async, CancellationToken cancellationToken)

=== End of inner exception stack trace ===
To see full exception details, enable PII Logging. See https://aka.ms/msal-net-logging
at System.Net.Http.HttpConnectionPool.ConnectToTcpHostAsync(String host, Int32 port, HttpRequestMessage initialRequest, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.AddHttp11ConnectionAsync(QueueItem queueItem)
at System.Threading.Tasks.TaskCompletionSourceWithCancellation1.WaitWithCancellationAsync(CancellationToken cancellationToken) at System.Net.Http.HttpConnectionPool.HttpConnectionWaiter1.WaitForConnectionWithTelemetryAsync(HttpRequestMessage request, HttpConnectionPool pool, Boolean async, CancellationToken requestCancellationToken)
at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.DiagnosticsHandler.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.Metrics.MetricsHandler.SendAsyncWithMetrics(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
at Azure.Core.Pipeline.HttpClientTransport.ProcessSyncOrAsync(HttpMessage message, Boolean async)

=== End of inner exception stack trace ===
To see full exception details, enable PII Logging. See https://aka.ms/msal-net-logging
at Azure.Core.Pipeline.HttpClientTransport.ProcessSyncOrAsync(HttpMessage message, Boolean async)
at Azure.Core.Pipeline.HttpPipelineTransportPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory1 pipeline) at Azure.Core.Pipeline.ResponseBodyPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory1 pipeline, Boolean async)
at Azure.Core.Pipeline.LoggingPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory1 pipeline, Boolean async) at Azure.Core.Pipeline.RedirectPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory1 pipeline, Boolean async)
at Azure.Core.Pipeline.RetryPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory1 pipeline, Boolean async) at Azure.Core.Pipeline.RetryPolicy.ProcessAsync(HttpMessage message, ReadOnlyMemory1 pipeline, Boolean async)
at Azure.Identity.ManagedIdentitySource.AuthenticateAsync(Boolean async, TokenRequestContext context, CancellationToken cancellationToken)
at Azure.Identity.ImdsManagedIdentitySource.AuthenticateAsync(Boolean async, TokenRequestContext context, CancellationToken cancellationToken)

=== End of inner exception stack trace ===
To see full exception details, enable PII Logging. See https://aka.ms/msal-net-logging
at Azure.Identity.ImdsManagedIdentitySource.AuthenticateAsync(Boolean async, TokenRequestContext context, CancellationToken cancellationToken)
at Azure.Identity.ManagedIdentityClient.AuthenticateCoreAsync(Boolean async, TokenRequestContext context, CancellationToken cancellationToken)
at Azure.Identity.ManagedIdentityClient.AppTokenProviderImpl(AppTokenProviderParameters parameters)
at Microsoft.Identity.Client.Internal.Requests.ClientCredentialRequest.SendTokenRequestToAppTokenProviderAsync(ILoggerAdapter logger, CancellationToken cancellationToken)
at Microsoft.Identity.Client.Internal.Requests.ClientCredentialRequest.GetAccessTokenAsync(CancellationToken cancellationToken, ILoggerAdapter logger)
at Microsoft.Identity.Client.Internal.Requests.ClientCredentialRequest.ExecuteAsync(CancellationToken cancellationToken)
at Microsoft.Identity.Client.Internal.Requests.RequestBase.<>c__DisplayClass11_1.<b__1>d.MoveNext()
--- End of stack trace from previous location ---
at Microsoft.Identity.Client.Utils.StopwatchService.MeasureCodeBlockAsync(Func`1 codeBlock)
at Microsoft.Identity.Client.Internal.Requests.RequestBase.RunAsync(CancellationToken cancellationToken)