Godot v3.0.6 error calling method from signal 'pressed':

Question

I click on the button and generates this error:

0:00:03:0129 - Error calling method from signal 'pressed': 'CanvasLayer(Interfaz.cs)::_on_StartButton_pressed': Method not found.
----------
Type:Error
Description: 
Time: 0:00:03:0129
C Error: Error calling method from signal 'pressed': 'CanvasLayer(Interfaz.cs)::_on_StartButton_pressed': Method not found.
C Source: core/object.cpp:1202
C Function: emit_signal

I do not know if this well this C# code:

public void OnStartButtonPressed()
{
    Button startButton = (Button)GetNode("StartButton");
    startButton.Hide();

    EmitSignal("StartGame");
}

Why can the error give?

Answer 1

Because the function really doesn't exist.
The error is stating that _on_StartButton_pressed cannot be found. You're showing us a function named OnStartButtonPressed!
You're missing the hyphens and the initials of "On" and "Pressed" should be lowercase.

Comments

In the documentation of Godot says that you have to write it this way:

Update: Anyway write it the way onStartButton_pressed() works.

---

You don't have to name them that way. It's just a naming convention.