ASP.NET Core アプリケーションで特定の時点から "Microsoft.AspNetCore.DataProtection.XmlEncryption.DpapiXmlEncryptor" エラーが発生しアプリケーションが実行できない

ビロコー

質問:突然 HTTP ERROR 500 が発生するようになりました

今まで問題なく動作していたWebアプリケーションが突然、HTTP ERROR 500 になってしまいました。イベントログを確認すると、System.Security.Cryptography.CryptographicException: Error occurred during a cryptographic operation. のエラーが記録されていました。対処方法を教えてください。

エラーメッセージ

Category: Microsoft.AspNetCore.DataProtection.XmlEncryption.DpapiXmlEncryptor
EventId: 54
SpanId: 1c5aa2be7a9a1dfd
TraceId: 8aea293b090eebc79313543ac8cd11e6
ParentId: 0000000000000000
RequestId: 40000028-0003-eb00-b63f-84710c7967bb
RequestPath: /(ASP.NET Core アプリケーションのパス)

An error occurred while encrypting to Windows DPAPI.

Exception: 
System.Security.Cryptography.CryptographicException: Error occurred during a cryptographic operation.
   at Microsoft.AspNetCore.DataProtection.Cng.DpapiSecretSerializerHelper.ProtectWithDpapiCore(Byte* pbSecret, UInt32 cbSecret, Byte* pbOptionalEntropy, UInt32 cbOptionalEntropy, Boolean fLocalMachine)
   at Microsoft.AspNetCore.DataProtection.Cng.DpapiSecretSerializerHelper.ProtectWithDpapi(ISecret secret, Boolean protectToLocalMachine)
   at Microsoft.AspNetCore.DataProtection.XmlEncryption.DpapiXmlEncryptor.Encrypt(XElement plaintextElement)

エラーメッセージ

Category: Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider
EventId: 48
SpanId: 1c5aa2be7a9a1dfd
TraceId: 8aea293b090eebc79313543ac8cd11e6
ParentId: 0000000000000000
RequestId: 40000028-0003-eb00-b63f-84710c7967bb
RequestPath: /(ASP.NET Core アプリケーションのパス)

An error occurred while reading the key ring.

Exception: 
System.Security.Cryptography.CryptographicException: Error occurred during a cryptographic operation.
   at Microsoft.AspNetCore.DataProtection.Cng.DpapiSecretSerializerHelper.ProtectWithDpapiCore(Byte* pbSecret, UInt32 cbSecret, Byte* pbOptionalEntropy, UInt32 cbOptionalEntropy, Boolean fLocalMachine)
   at Microsoft.AspNetCore.DataProtection.Cng.DpapiSecretSerializerHelper.ProtectWithDpapi(ISecret secret, Boolean protectToLocalMachine)
   at Microsoft.AspNetCore.DataProtection.XmlEncryption.DpapiXmlEncryptor.Encrypt(XElement plaintextElement)
   at Microsoft.AspNetCore.DataProtection.XmlEncryption.XmlEncryptionExtensions.EncryptIfNecessary(IXmlEncryptor encryptor, XElement element)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager.Microsoft.AspNetCore.DataProtection.KeyManagement.Internal.IInternalXmlKeyManager.CreateNewKey(Guid keyId, DateTimeOffset creationDate, DateTimeOffset activationDate, DateTimeOffset expirationDate)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager.CreateNewKey(DateTimeOffset activationDate, DateTimeOffset expirationDate)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider.CreateCacheableKeyRingCore(DateTimeOffset now, IKey keyJustAdded)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider.GetCurrentKeyRingCore(DateTime utcNow, Boolean forceRefresh)

エラーメッセージ

Category: Microsoft.AspNetCore.Server.IIS.Core.IISHttpServer
EventId: 2
SpanId: 1c5aa2be7a9a1dfd
TraceId: 8aea293b090eebc79313543ac8cd11e6
ParentId: 0000000000000000
RequestId: 40000028-0003-eb00-b63f-84710c7967bb
RequestPath: /(ASP.NET Core アプリケーションのパス)

Connection ID "16933534612603273255", Request ID "40000028-0003-eb00-b63f-84710c7967bb": An unhandled exception was thrown by the application.

Exception: 
System.Security.Cryptography.CryptographicException: Error occurred during a cryptographic operation.
   at Microsoft.AspNetCore.DataProtection.Cng.DpapiSecretSerializerHelper.ProtectWithDpapiCore(Byte* pbSecret, UInt32 cbSecret, Byte* pbOptionalEntropy, UInt32 cbOptionalEntropy, Boolean fLocalMachine)
   at Microsoft.AspNetCore.DataProtection.Cng.DpapiSecretSerializerHelper.ProtectWithDpapi(ISecret secret, Boolean protectToLocalMachine)
   at Microsoft.AspNetCore.DataProtection.XmlEncryption.DpapiXmlEncryptor.Encrypt(XElement plaintextElement)
   at Microsoft.AspNetCore.DataProtection.XmlEncryption.XmlEncryptionExtensions.EncryptIfNecessary(IXmlEncryptor encryptor, XElement element)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager.Microsoft.AspNetCore.DataProtection.KeyManagement.Internal.IInternalXmlKeyManager.CreateNewKey(Guid keyId, DateTimeOffset creationDate, DateTimeOffset activationDate, DateTimeOffset expirationDate)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager.CreateNewKey(DateTimeOffset activationDate, DateTimeOffset expirationDate)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider.CreateCacheableKeyRingCore(DateTimeOffset now, IKey keyJustAdded)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider.GetCurrentKeyRingCore(DateTime utcNow, Boolean forceRefresh)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.Protect(Byte[] plaintext)
   at Microsoft.AspNetCore.Session.CookieProtection.Protect(IDataProtector protector, String data)
   at Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContextOfT'1.ProcessRequestAsync()