ImageSlider DevExpress C#, Unhandled exception of type 'System.NullReferenceException'?

Question

C++ / C#

Good afternoon!
I put ImageSlider from DX on the form and almost always the following error occurs at startup:

Unhandled exception of type 'System.NullReferenceException' in DevExpress.XtraEditors.v15.2.dll
Additional information: An object reference does not point to an instance of an object.

I didn’t find anything on this topic in Google, tell me, can anyone come across what to do?
Thank you.