Okta：无法从“ System.String”

如何解决Okta：无法从“ System.String”

我正在使用Okta构建用于身份验证的应用程序，但API请求将始终返回500错误。我使用@okta/okta-react获取访问令牌，但是在发送Authorization标头（Bearer {accesstoken}）时，服务器无法处理它。

服务器针对每个请求答复以下错误。

Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler[3]
      Exception occurred while processing message.
system.invalidOperationException: IDX20803: Unable to obtain configuration from: 'System.String'.
 ---> System.IO.IOException: IDX20807: Unable to retrieve document from: 'System.String'. HttpResponseMessage: 'System.Net.Http.HttpResponseMessage',HttpResponseMessage.Content: 'System.String'.
   at Microsoft.IdentityModel.Protocols.HttpDocumentRetriever.GetDocumentAsync(String address,CancellationToken cancel)
   at Microsoft.IdentityModel.Protocols.OpenIdConnect.OpenIdConnectConfigurationRetriever.GetAsync(String address,IDocumentRetriever retriever,CancellationToken cancel)
   at Microsoft.IdentityModel.Protocols.ConfigurationManager`1.GetConfigurationAsync(CancellationToken cancel)
   --- End of inner exception stack trace ---
   at Microsoft.IdentityModel.Protocols.ConfigurationManager`1.GetConfigurationAsync(CancellationToken cancel)
   at Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler.HandleAuthenticateAsync()

我正在使用Okta.AspNetCore软件包进行配置。我的创业班有

public void ConfigureServices(IServiceCollection services)
{

services.AddAuthentication(options =>
    {
        options.DefaultAuthenticateScheme = OktaDefaults.ApiAuthenticationScheme;
        options.DefaultChallengeScheme = OktaDefaults.ApiAuthenticationScheme;
        options.DefaultSignInScheme = OktaDefaults.ApiAuthenticationScheme;
    })
    .AddOktaWebApi(new OktaWebApiOptions()
    {
        OktaDomain = Configuration["Okta:Authority"],});

services.AddAuthorization();
services.AddControllersWithViews();

...
}

和

public void Configure(IApplicationBuilder app,IWebHostEnvironment env)
{
    app.UseRouting();
    app.UseAuthentication();
    app.UseAuthorization();
    app.UseEndpoints(endpoints => ...
}

我已经做了很多寻找答案的工作，但是其中大多数是相似的，但不是相同的问题。任何帮助将不胜感激！