"Get Viewport Size" breaks in Standalone, works in Play in Editor

I am using “Get Viewport Size” within my HUD Actor. “Get Viewport Size” is then set as two variables, the two outputs of X and Y. Get Viewport Size outputs x:0 y:0 when run in Standalone, I don’t know why it does this.

What function should I call from instead or Get Viewport Size in order to get my screen size if this is not the intended method?

[VIDEO ATTACHED HERE, YOUTUBE LINK][1]

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