Error logs are full of a \"Could not decrypt\" error

Unknown

Error logs are full of a \"Could not decrypt\" error

Unknown

[u][i][b]Error dump as follows:[/b][/i][/u]
Message : Could not decrypt settings. Possible old DES alg in use, trying to fall back. System.Security.Cryptography.CryptographicException: The input data is not a complete block.
Category : System
Level : Warn
Timestamp: 10/19/2020 3:23:35 PM
Exception: [Message]:Could not decrypt settings. Possible old DES alg in use, trying to fall back. System.Security.Cryptography.CryptographicException: The input data is not a complete block. at System.Security.Cryptography.CapiSymmetricAlgorithm.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) at System.Security.Cryptography.CryptoStream.FlushFinalBlock() at System.Security.Cryptography.CryptoStream.Dispose(Boolean disposing) at System.IO.Stream.Close() at DecisionsFramework.EncryptionHelper.DecryptByteArray(Byte[] key, Byte[] value, SymetricalCryptographyTypes type) at DecisionsFramework.ServiceLayer.Settings.DecryptedString(String encryptString)
[b][i][u]We are using version 5.7.3[/u][/i][/b]
This error occurs so frequently that our error logs only go back six days.