Server Error in '/viWeb' Application.

Array cannot be null.
Parameter name: bytes

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.ArgumentNullException: Array cannot be null.
Parameter name: bytes

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:


[ArgumentNullException: Array cannot be null.
Parameter name: bytes]
   System.Text.Encoding.GetString(Byte[] bytes) +14139331
   viWeb.GenerateURL.DecryptRequestParam(HttpRequest req) in D:\a\1\s\viWeb\admin\GenerateURL.vb:111
   viWeb.viAbstractMaster.SetSessionFromRequestParameters() in D:\a\1\s\viWeb\viAbstractMaster.vb:127
   viWeb.VoorinschrijvingBasisSec.Page_Load(Object sender, EventArgs e) in D:\a\1\s\viWeb\publiek\basissec\Voorinschrijving.aspx.vb:24
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +154
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4082


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0