I searched for and added the materialfx library to SceneBuilder app . Attaching the screenshot. It works fine when i go to the "SceneBuilder" app within the Inteliij IDE. It shows all the controls ...
at javafx.fxml/javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1857) at javafx.fxml/javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader ...