[Identity V3] The remote host has forced an existing connection to be shut down.

[ghforgaofeng]

Hello everyone：
I'm using the authentication V3, but I can't do it now.
Message: Unable to read data from the transport connection: the remote host has forced an existing connection to be shut down.
If I could get help, I would appreciate it.

This is my code:
static void Main(string[] args)
{
OpenstackIdentityProvider provider = new OpenstackIdentityProvider(endpoint, userId, password, scopeId, scopeType);
ComputeService service = new ComputeService(provider, region);
var server = ComputeServiceExtensions_v2_1.GetServer(service, serverId);
}