Blazor .NET 8添加AD登录后遇InvalidOperationException错误求助

我基于.NET 8.0的Blazor框架开发网站，在集成Active Directory登录功能后，出现如下错误：

System.InvalidOperationException: Cannot find the fallback endpoint specified by route values: { page: /_Host, area:  }.
   at Microsoft.AspNetCore.Mvc.RazorPages.Infrastructure.DynamicPageEndpointMatcherPolicy.ApplyAsync(HttpContext httpContext, CandidateSet candidates)
   at Microsoft.AspNetCore.Routing.Matching.DfaMatcher.SelectEndpointWithPoliciesAsync(HttpContext httpContext, IEndpointSelectorPolicy[] policies, CandidateSet candidateSet)
   at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.<Invoke>g__AwaitMatch|10_1(EndpointRoutingMiddleware middleware, HttpContext httpContext, Task matchTask)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

我尝试了网上找到的解决方案，在项目.csproj中添加以下配置，但问题未得到解决：

<PropertyGroup>
    <UseRazorSourceGenerator>false</UseRazorSourceGenerator>
</PropertyGroup>

现提供以下文件代码及项目结构截图，希望能有人指出问题所在并给出解决办法：

• _Host.cshtml 代码
• Program.cs 代码
• Index.razor 代码
• 项目结构截图

内容的提问来源于stack exchange，提问作者jamie.tsc