Trying to Get Swagger Identity Working

Program.cs

using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.Identity.Web;
using Microsoft.OpenApi.Models;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddMicrosoftIdentityWebApi(builder.Configuration.GetSection("AzureAd")).EnableTokenAcquisitionToCallDownstreamApi()
            .AddMicrosoftGraph(builder.Configuration.GetSection("MicrosoftGraph"))
            .AddDownstreamWebApi("DownstreamApi",builder.Configuration.GetSection("DownstreamApi"))
            .AddInMemoryTokenCaches();

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
var tenantId = builder.Configuration.GetSection("AzureAd")["TenantId"];
builder.Services.AddSwaggerGen(options =>
{
    options.AddSecurityDefinition("oauth2", new OpenApiSecurityScheme
    {
        // This next line is what is causing the issue
        Type = SecuritySchemeType.OpenIdConnect,
        
        Flows = new OpenApiOAuthFlows
        {
            AuthorizationCode = new OpenApiOAuthFlow
            {
                AuthorizationUrl = new Uri($"https://login.microsoftonline.com/{tenantId}/oauth2/v2.0/authorize"),
                TokenUrl = new Uri($"https://login.microsoftonline.com/{tenantId}/oauth2/v2.0/token"),
                Scopes = new Dictionary<string, string> { { "openid", "Scope to enable OIDC" } }
            }
        }
    });
});

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();

    var clientId = builder.Configuration.GetSection("AzureAd")["ClientId"];
    var clientSecret = builder.Configuration.GetSection("AzureAd")["ClientSecret"];
    app.UseSwaggerUI(swaggerUiOptions =>
    {
        swaggerUiOptions.OAuthAppName("Framework App Test");
        swaggerUiOptions.OAuthClientId(clientId);
        swaggerUiOptions.OAuthClientSecret(clientSecret);
        swaggerUiOptions.OAuthUsePkce();
        swaggerUiOptions.OAuthUseBasicAuthenticationWithAccessCodeGrant();
        // Check the openid scope by default.  (It adds in user information and is almost always wanted.)
        swaggerUiOptions.OAuthScopes("openid");
    });
}

app.UseHttpsRedirection();

app.UseAuthentication();
app.UseAuthorization();

app.MapControllers();

app.Run();