Ruby's Adventure Script is bugged/Has an error!

I have got up to Step 11/12 in this tutorial and the game is telling me there is an error in the code. I know next to nothing about how to code and I don't know how to fix it.

Here is the code as of part 14. I copied and pasted it verbatim from the end of that part of the tutorial:
public class RubyController : MonoBehaviour
{
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
float horizontal = Input.GetAxis("Horizontal");
float vertical = Input.GetAxis("Vertical");
Vector2 position = transform.position;
position.x = position.x + 3.0f * horizontal * Time.deltaTime;
position.y = position.y + 3.0f * vertical * Time.deltaTime;
transform.position = position;
}
}
Compiler Error is attached.

I'm at a loss.

 

Doesn't look like compiler errors. If you clear, do any of the errors stay up?

 

Yes the following:
Assets\Scripts\RubyController.cs(1,31): error CS0246: The type or namespace name 'MonoBehaviour' could not be found (are you missing a using directive or an assembly reference?)

 

Anyone have thoughts on this?

 

Can you post your version of that script with code tags?

 

My first impression is that you may be missing using UnityEngine; at the top of the script. Especially if you copied+pasted it from a tutorial of some sort, as they tend to leave little details /s like that out at times. But yeah, code tags. Always code tags.

 

It also seems like perhaps you didn't install Visual Studio when you installed Unity and it's having issue with that.

 

I did install Visual Studio, it's what I'm using to write the code. When I get home I'll post my code.