Facebook - How to remove loading screen from Instant Games

I am currently running into some trouble of trying to remove the loading screen from Facebook Instant Games.

I have tried following this Quick Start tutorial. Unfortunately, the loading screen still appears.

Screenshot of the problem

I am using the Unity game engine to create games. Any recommendations on how to remove it would be highly appreciated.

You need to be using the Instant Games API. For example:

FBInstant.intializeAsync().then(() => {
  // load your game
  return FBInstant.startGameAsync();
}).then(() => {
  // your game logic
});

You can't use this API directly from C# as it's a JavaScript API. To use JavaScript from Unity see this tutorial: https://docs.unity3d.com/Manual/webgl-interactingwithbrowserscripting.html