Creaing a Slate Widget in MoviePlayer Loading Screen that uses an animated material

I’m curious if anyone who has built a loading screen with this A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums concept in mind was able to manage having it function as intended and make a slate that uses a material.

At this point in my code, I am creating the loading screen (at least the engine tells me I am) and nothing appears when testing it with the default NewTestLoadingScreenWidget(). The goal is to replace that with an image that has a material on it that plays an animation. Any input would be much appreciated.