Enable Unreal Engine's Default Split Screen

Before using the Advanced Split Screen System, you must first enable Unreal Engine's default split-screen.

To do this:

1. Go to Project Settings.

2. Navigate to Maps & Modes.

3. Locate the Use Split Screen option.

4. Make sure it is enabled.

This step is mandatory because the Advanced Split Screen System relies on Unreal Engine's internal split-screen activation to function properly.