ASPDNSF Error: Padding is invalid and cannot be removed

AspDotNetStorefront: Version 7.1.0.0

Problem:

Error when trying to view website:

Padding is invalid and cannot be removed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Security.Cryptography.CryptographicExceptio n: Padding is invalid and cannot be removed.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[CryptographicException: Padding is invalid and cannot be removed.]
System.Security.Cryptography.RijndaelManagedTransf orm.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast) +1545747
System.Security.Cryptography.RijndaelManagedTransf orm.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) +257
System.Security.Cryptography.CryptoStream.FlushFin alBlock() +30
System.Web.Configuration.MachineKeySection.Encrypt OrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Boolean useValidationSymAlgo) +164
System.Web.Security.FormsAuthentication.Decrypt(St ring encryptedTicket) +242
AspDotNetStorefront.Global.tX3TGN0Tm(Object , EventArgs ) +1551
AspDotNetStorefront.Global.Application_Authenticat eRequest(Object sender, EventArgs e) +37
System.Web.SyncEventExecutionStep.System.Web.HttpA pplication.IExecutionStep.Execute() +92
System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean& completedSynchronously) +64

Solution:

Clear browser cache and cookies.