What is the procedure to have access to On demand Video? When I try I get; Server Error in '/' Application.

Server Error in '/' Application.


Key not valid for use in specified state.

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: Key not valid for use in specified state.


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: Key not valid for use in specified state.
]
   System.Security.Cryptography.ProtectedData.Unprotect(Byte[] encryptedData, Byte[] optionalEntropy, DataProtectionScope scope) +407
   System.IdentityModel.ProtectedDataCookieTransform.Decode(Byte[] encoded) +64

[InvalidOperationException: ID1073: A CryptographicException occurred when attempting to decrypt the cookie using the ProtectedData API (see inner exception for details). If you are using IIS 7.5, this could be due to the loadUserProfile setting on the Application Pool being set to false. ]
   System.IdentityModel.ProtectedDataCookieTransform.Decode(Byte[] encoded) +320
   System.IdentityModel.Tokens.SessionSecurityTokenHandler.ApplyTransforms(Byte[] cookie, Boolean outbound) +177
   System.IdentityModel.Tokens.SessionSecurityTokenHandler.ReadToken(XmlReader reader, SecurityTokenResolver tokenResolver) +737
   System.IdentityModel.Tokens.SessionSecurityTokenHandler.ReadToken(Byte[] token, SecurityTokenResolver tokenResolver) +83
   System.IdentityModel.Services.SessionAuthenticationModule.ReadSessionTokenFromCookie(Byte[] sessionCookie) +508
   System.IdentityModel.Services.SessionAuthenticationModule.TryReadSessionTokenFromCookie(SessionSecurityToken& sessionToken) +164
   System.IdentityModel.Services.SessionAuthenticationModule.OnAuthenticateRequest(Object sender, EventArgs eventArgs) +146
   Bentley.Framework.Authentication.WsSessionAuthenticationModule.OnAuthenticateRequest(Object sender, EventArgs eventArgs) +183
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +160
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +115

 


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34274