Dear ST Team any idea what this error about which is can see in \MRS\Log\Error.log file

 

Could not get current user
Error occurred during a cryptographic operation.
System.Security.Cryptography.CryptographicException: Error occurred during a cryptographic operation.
   at System.Web.Security.Cryptography.HomogenizingCryptoServiceWrapper.HomogenizeErrors(Func`2 func, Byte[] input)
   at System.Web.Security.FormsAuthentication.Decrypt(String encryptedTicket)
   at SmarterTrack.HelperClasses.Security.ManagementUserInfo.GetCurrentUser(HttpContext context)