MultiScaleVODownsample1.compute: Kernel at index {0} is invalid

Hi!
I'm new to Unity, and while working on a project I have suddenly started getting these errors, and although they don't affect enabling play mode, I would like to know what is causing these errors and how to fix them.
Any help would be greatly appreciated!

MultiScaleVODownsample1.compute: Kernel at index (0) is invalid

UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

IndexOutOfRangeException: Invalid kernelIndex (1) passed, must be non-negative less than 4.

UnityEngine.Rendering.PostProcessing.MultiScaleVO.PushRenderCommands (UnityEngine.Rendering.CommandBuffer cmd, System.Int32 source, System.Int32 destination, UnityEngine.Vector3 sourceSize, System.Single tanHalfFovH, System.Boolean isMSAA) (at C:/Users/abdul/AppData/Local/Temp/929f68967ccf8424f9c7f4459205b507/Library/PackageCache/com.unity.postprocessing@2.3.0/PostProcessing/Runtime/Effects/MultiScaleVO.cs:371)

UnityEngine.Rendering.PostProcessing.MultiScaleVO.GenerateAOMap (UnityEngine.Rendering.CommandBuffer cmd, UnityEngine.Camera camera, UnityEngine.Rendering.RenderTargetIdentifier destination, System.Nullable`1[T] depthMap, System.Boolean invert, System.Boolean isMSAA) (at C:/Users/abdul/AppData/Local/Temp/929f68967ccf8424f9c7f4459205b507/Library/PackageCache/com.unity.postprocessing@2.3.0/PostProcessing/Runtime/Effects/MultiScaleVO.cs:172)

UnityEngine.Rendering.PostProcessing.MultiScaleVO.RenderAmbientOnly (UnityEngine.Rendering.PostProcessing.PostProcessRenderContext context) (at C:/Users/abdul/AppData/Local/Temp/929f68967ccf8424f9c7f4459205b507/Library/PackageCache/com.unity.postprocessing@2.3.0/PostProcessing/Runtime/Effects/MultiScaleVO.cs:519)

UnityEngine.Rendering.PostProcessing.PostProcessLayer.BuildCommandBuffers () (at C:/Users/abdul/AppData/Local/Temp/929f68967ccf8424f9c7f4459205b507/Library/PackageCache/com.unity.postprocessing@2.3.0/PostProcessing/Runtime/PostProcessLayer.cs:561)

UnityEngine.Rendering.PostProcessing.PostProcessLayer.OnPreCull () (at C:/Users/abdul/AppData/Local/Temp/929f68967ccf8424f9c7f4459205b507/Library/PackageCache/com.unity.postprocessing@2.3.0/PostProcessing/Runtime/PostProcessLayer.cs:462)

UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

 

I have somehow managed to fix this by reimporting the built-in Shaders in Packages > Post Processing.

 

Thanks