Check shader after loading it, throw an exception with a message on failure. This is better than having a random nullref happen, if the shaders cannot be loaded for whatever reason.

Assets/Scripts/Core/Fsr2Pipeline.cs

@@ -108,7 +108,11 @@ namespace FidelityFX
         private void LoadComputeShader(string name, Fsr2.InitializationFlags flags, ref ComputeShader shaderRef, out int kernelIndex)
         {
             if (shaderRef == null)
+            {
                 shaderRef = ContextDescription.Callbacks.LoadComputeShader(name);
+                if (shaderRef == null)
+                    throw new MissingReferenceException($"Shader '{name}' could not be loaded! Please ensure it is included in the project correctly.");
+            }
 
             kernelIndex = shaderRef.FindKernel("CS");