NullReferenceExceptionIsThrown when I use InitializeComponent(); method in my Devexpress XtraReport constructor

Question

I am using DevExpress XtraReport to pass some data through it and export report's pdf. But whenever i try to create new instance of my report i get nullReferenceException.

Here is the place where I create a new instance of my report:

var report = new ReportReagent(User.ToString(), DateTime.Now, User.Identity.Name.ToString(), parameters);

How my constructor looks:

 public ReportReagent(string partnerName,DateTime currentDate,string userFIO,List<string> parameters)
    {
        InitializeComponent();
        _currentDate = currentDate;
        _partnerName = partnerName;
        _userFIO = userFIO;
        DataSource = parameters;
    }

And designer where i get the exception,I better show it with the screenshot:

Place where i get the exception

I tried googling and other stuff, but still did't manage to find the reason of the problem. If you need some extra information, please tell me.