Don't understand "Inconsistent Accessibility" error when passing Enum as parameter inside my method

Struggling to understand why I am getting the following error message –

Inconsistent Accessibility: Parameter type "GameModesMenu.GameMode" is less accessible than method "GameModesMenu.SelectedGameModeTextObject(GameMode _gameModeSelected)"

This is what my code looks like:

enum GameMode{None, PlayerVsAi1v1};

private GameMode gameModeSelected = GameMode.None;

public void PlayerVsAiOneVsOne()
{
    gameModeSelected = GameMode.PlayerVsAi1v1;
    SelectedGameModeTextObject(gameModeSelected);
}



public void SelectedGameModeTextObject(GameMode _gameModeSelected)
    {
        Debug.Log(_gameModeSelected);
        
    }

The error message goes away when I add the "public" access modifier to the enum like so:

public enum GameMode{None, PlayerVsAi1v1};

But I don’t understand why that works. I also don’t understand why I can access it with no problems within the methods, but the error only occurs when I pass it as a parameter.

>Solution :

Since the method is public, the enum parameter must also be public, so that it will be visible to the outer world.