Unity UI showing in Editor, but not in Build

I should start by saying that I am new to UI in general. Never touched the legacy GUI UI in Unity before.

I am using the new Canvas UI system. I have set the canvas to 'Render Mode: Screen Space - Camera' and linked the Main Camera to it. I have positioned Text elements to the Canvas and positioned them where I want. Everything looks good when I run in the editor; however, after building and running as a desktop/web app, the UI does not show up.