该错误通常出现在配置问题或在处理响应时出现问题。如果您遇到此错误，请检查您的 OIDC 配置和对应客户端的配置。您还可以通过查看 OpenIdConnect 处理程序是否已成功处理响应来检查问题是否出现在响应处理中。

以下是解决方案的示例代码：

Startup.cs

services.AddAuthentication(options =>
{
    options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
})
.AddCookie(CookieAuthenticationDefaults.AuthenticationScheme, options =>
{
    options.ExpireTimeSpan = TimeSpan.FromMinutes(30);
})
.AddOpenIdConnect(OpenIdConnectDefaults.AuthenticationScheme, options =>
{
    options.Authority = "https://localhost:5001/";
    options.ClientId = "blazorwasmclient";
    options.ClientSecret = "blazorclientsecret";
    options.ResponseType = "code";
    options.UsePkce = true;

    options.Scope.Clear();
    options.Scope.Add("openid");
    options.Scope.Add("profile");
    options.Scope.Add("email");
    options.Scope.Add("phone");
    options.Scope.Add("api.read");
    options.Scope.Add("api.write");
    
    options.CallbackPath = "/signin-oidc";
    options.SignedOutCallbackPath = "/signout-callback-oidc";
    options.RemoteSignOutPath = "/signout-oidc";
    
    options.SaveTokens = true;

    options.TokenValidationParameters = new TokenValidationParameters
    {
        NameClaimType = "name",
        RoleClaimType = "role"
    };
});

Index.razor

@page "/"
@using Microsoft.AspNetCore.Authorization

@attribute [Authorize]

Hello, @context.User.Identity.Name!
You are authorized to view this page.

如果配置正确，但仍遇到此问题，请尝试使用以下代码在 Index.razor 中获取令牌：

@using System.IdentityModel.Tokens.Jwt
@using