[Question] Access error

[anan1213095357]

 if (!Directory.Exists(AppContext.BaseDirectory + "LettuceEncrypt"))
     Directory.CreateDirectory(AppContext.BaseDirectory + "LettuceEncrypt");
 builder.Services.AddLettuceEncrypt();
 builder.WebHost.UseKestrel(options =>
 {
     options.ListenAnyIP(2222, listenOptions => listenOptions.UseHttps());
 });
 if (Environment.GetEnvironmentVariable("REQUIR_CLIENT_CERT") == "true")
 {

     builder.WebHost.UseKestrel(k =>
     {
         var appServices = k.ApplicationServices;
         k.ConfigureHttpsDefaults(h =>
         {
             h.ClientCertificateMode = ClientCertificateMode.RequireCertificate;
             h.UseLettuceEncrypt(appServices);
         });
     });
 }
 if (Environment.GetEnvironmentVariable("CONFIG_KESTREL_VIA_CODE") == "true")
 {
     builder.WebHost.PreferHostingUrls(false);
     builder.WebHost.UseKestrel(k =>
     {
         var appServices = k.ApplicationServices;
         k.Listen(IPAddress.Any, 2222,
             o =>
                 o.UseHttps(h => h.UseLettuceEncrypt(appServices)));
     });
 }

fail: LettuceEncrypt.Internal.AcmeCertificateFactory[0]
Failed to validate ownership of domainName 'sanyouhe.cloud'. Reason: urn:ietf:params:acme:error:connection: 27.154.111.178: Timeout during connect (likely firewall problem), Code = BadRequest
fail: LettuceEncrypt.Internal.AcmeCertificateFactory[0]
Failed to validate ownership of domainName 'www.sanyouhe.cloud'. Reason: urn:ietf:params:acme:error:connection: 27.154.111.178: Timeout during connect (likely firewall problem), Code = BadRequest
fail: LettuceEncrypt.Internal.AcmeStates.ServerStartupState[0]
Failed to automatically create a certificate for sanyouhe.cloud
System.InvalidOperationException: Failed to validate ownership of domainName 'sanyouhe.cloud'
at LettuceEncrypt.Internal.AcmeCertificateFactory.ValidateDomainOwnershipAsync(IAuthorizationContext authorizationContext, CancellationToken cancellationToken)
at LettuceEncrypt.Internal.AcmeCertificateFactory.CreateCertificateAsync(CancellationToken cancellationToken)
at LettuceEncrypt.Internal.AcmeStates.BeginCertificateCreationState.MoveNextAsync(CancellationToken cancellationToken)
fail: LettuceEncrypt.Internal.AcmeCertificateLoader[0]
ACME state machine encountered unhandled error
System.InvalidOperationException: Failed to validate ownership of domainName 'sanyouhe.cloud'
at LettuceEncrypt.Internal.AcmeCertificateFactory.ValidateDomainOwnershipAsync(IAuthorizationContext authorizationContext, CancellationToken cancellationToken)
at LettuceEncrypt.Internal.AcmeCertificateFactory.CreateCertificateAsync(CancellationToken cancellationToken)
at LettuceEncrypt.Internal.AcmeStates.BeginCertificateCreationState.MoveNextAsync(CancellationToken cancellationToken)
at LettuceEncrypt.Internal.AcmeCertificateLoader.ExecuteAsync(CancellationToken stoppingToken)