Problem displaying widget

I’m trying to add my userwidget “Rosterlist” to the viewport by calling “this->AddN()” in the gameinstance c++ class where AddN() is a blueprint implemented function defined in the gameinstance blueprint. However the roster list doesn’t show up on screen. What might I be doing wrong?

First of all check RoosterPart2 widget hierarchy and see if all widgets in a widget tree have visibility setting not set to hidden or collapsed.
If it’s OK, set a breakpoint on one of the nodes on the screenshot above and see if this function is even being called.
To set a breakpoint click right mouse button on the node find Toggle Breakpoint option. Or simply hit F9 when the node is selected.