IdentityServer 4和TLS1.2

Question

我已经禁用了TLS 1.0和TLS 1.1。在Identity Server中(使用WebHostBuilder在服务结构群集中运行的v4，使用自签名证书以.NET 4.6.2为目标)。我在Startup.cs中添加了以下内容：

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

并且我收到以下错误：

System.InvalidOperationException: IDX10803: Unable to create to obtain 
configuration from: 'https://services.mytest.com:8443/oauth/.well- 
known/openid-configuration'. ---> System.IO.IOException: Unable to get 
document from: https://services.mytest.com:8443/oauth/.well- 
known/openid-configuration ---> System.Net.Http.HttpRequestException: An 
error occurred while sending the request. ---> System.Net.WebException: The 
underlying connection was closed: An unexpected error occurred on a receive. 
---> System.ComponentModel.Win32Exception: The client and server cannot 
communicate, because they do not possess a common algorithm

我看过这里的问题：

IDX10803: Unable to create to obtain configuration

Unable to obtain configuration from well-known/openid-configuration

我已经尝试过这些建议(包括将证书添加到受信任的根目录)