一、问题描述

报错信息如下：

System.InvalidOperationException: IDX20803: Unable to obtain configuration from: 'System.String'.\r\n ---> System.IO.IOException: IDX20804: Unable to retrieve document from: 'System.String'.
 ---> System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
  ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid because of errors in the certificate chain: UntrustedRoot
  at System.Net.Security.SslStream.SendAuthResetSignal(ProtocolToken message, ExceptionDispatchInfo exception)
   at System.Net.Security.SslStream.CompleteHandshake(SslAuthenticationOptions sslAuthenticationOptions)
    at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](TIOAdapter adapter, Boolean receiveFirst, Byte[] reAuthenticationData, Boolean isApm)
     at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
      --- End of inner exception stack trace ---\r\n at

拿出报错关键字‘errors in the certificate chain: UntrustedRoot’

二、解决办法

这就是证书链的问题，安装证书文件时，里面是多个一起的，把里面对应的证书在证书管理器里删掉，然后重新安装就好了。