opengl underlay

Hi forum, I have followed the video tutorial about integrating qt quick 2 with opengl as underlay from KDAB. I am having the following console output: QSGContext::initialize: stencil buffer support missing, expect rendering errors I can see the opengl scene though with qt quick 2 scene with erratic behavior. I have checked the quick 2 scene separately and it works fine. While integration i get something otherwise. Any hint to solve this issue ? Thanks