Exception : System.NullReferenceException: Object reference not set to an instance of an object. at Allotment.RegistrationLogistics.Decrypt(String cipherText) in F:\13-06-2022 AK\AkshatLive\Allotment\Allotment\RegistrationLogistics.aspx.cs:line 187 at Allotment.RegistrationLogistics.Page_Load(Object sender, EventArgs e) in F:\13-06-2022 AK\AkshatLive\Allotment\Allotment\RegistrationLogistics.aspx.cs:line 46