CryptographicException: Padding is invalid and cannot be removed.

Somethings to try when error such as below occur:

1. Recycle application pool

2. Clear cookies

Server Error in '/' Application.

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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.CryptographicException: 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.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast) +7599262 System.Security.Cryptography.RijndaelManagedTransform.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) +208 System.Security.Cryptography.CryptoStream.FlushFinalBlock() +33 System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, IVType ivType, Boolean useValidationSymAlgo) +225 System.Web.Security.FormsAuthentication.Decrypt(String encryptedTicket) +246 Sitecore.Security.Authentication.AuthenticationHelper.GetCurrentUser() +125 Sitecore.Security.Authentication.AuthenticationHelper.GetActiveUser() +14 Sitecore.Security.Authentication.AuthenticationProvider.GetActiveUser() +15 Sitecore.Security.Authentication.AuthenticationManager.GetActiveUser() +24 Sitecore.Pipelines.HttpRequest.UserResolver.Process(HttpRequestArgs args) +22 (Object , Object[] ) +61 Sitecore.Pipelines.PipelineMethod.Invoke(Object[] parameters) +36 Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args) +141 Sitecore.Pipelines.CorePipeline.Run(String pipelineName, PipelineArgs args, String pipelineDomain) +134 Sitecore.Pipelines.CorePipeline.Run(String pipelineName, PipelineArgs args) +50 Sitecore.Nexus.Web.HttpModule. (Object sender, EventArgs e) +252 System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +68 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75