Hm… later I will google what is it and how it should be properly used.
Also I will really need pre-build template for some latest stable version - 12 or 13.1; as I remember you succeed in that.
Just to find out, why new empty a-bit-modified app freeze on lines like this:
auto sprite = Sprite::create("some.png"); this->addChild(sprite); - may be object is not created.