Camera-Based Reflections no longer working

I put this script I have been using a lot in other projects in a new project, but I am now getting an error when I try to run it.

The error:
Object reference not set to an instance of an object
RealtimeReflection.Update () (at Assets/RealtimeReflection.cs:15)

The code:

Code (CSharp):

1. using UnityEngine;
2.  
3. public class RealtimeReflection : MonoBehaviour
4. {
5.  
6.     ReflectionProbe probe;
7.  
8.     void Awake()
9.     {
10.         probe = GetComponent<ReflectionProbe>();
11.     }
12.  
13.     void Update()
14.     {
15.         probe.transform.position = new Vector3(
16.             Camera.main.transform.position.x,
17.             Camera.main.transform.position.y * -1,
18.             Camera.main.transform.position.z
19.         );
20.  
21.         probe.RenderProbe();
22.     }
23. }

 

Does the gameobject have a ReflectionProbe attached? You should add a RequiresComponent attribute if the script NEEDS a certain component to actually function.

 

The script is sitting on a ReflectionProbe object which is a child of my camera.

 

Do you have a camera in your scene which is tagged as "MainCamera" ?

It's either the Camera or the probe which is null.

 

I think I found the problem, the probe moves far below what it should do.
The probe moves to around -10Y, but also has a random position for X and Z, which I don't understand.

This never happened before the new project, and I have changed nothing, but it isn't working as it should, or did.