Kernel 'main' not found

I’m trying to generate the PC player of my game, but I’m getting this two errors… I don’t know, once per frame maybe?.. I haven’t seen this on previous builds, the only difference with this one is that I changed the rendering path from deferred to forward.

UnloadTime: 2.200034 ms
Kernel ‘main’ not found
UnityEngine.ComputeShader:FindKernel(String)
UnityEngine.Rendering.PostProcessing.MultiScaleVO:pushDownsampleCommands(CommandBuffer, Camera, Nullable1) (at C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\Effects\MultiScaleVO.cs:231) UnityEngine.Rendering.PostProcessing.MultiScaleVO:GenerateAOMap(CommandBuffer, Camera, RenderTargetIdentifier, Nullable1, Boolean) (at C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\Effects\MultiScaleVO.cs:162)
UnityEngine.Rendering.PostProcessing.MultiScaleVO:RenderAmbientOnly(PostProcessRenderContext) (at C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\Effects\MultiScaleVO.cs:468)
UnityEngine.Rendering.PostProcessing.PostProcessLayer:BuildCommandBuffers() (at C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\PostProcessLayer.cs:352)
UnityEngine.Rendering.PostProcessing.PostProcessLayer:OnPreCull() (at C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\PostProcessLayer.cs:292)

[C:\buildslave\unity\build\Runtime/Shaders/ComputeShader.cpp line 311]
(Filename: C:/ProgramData/Unity/cache/packages/packages.unity.com/com.unity.postprocessing@2.0.3-preview/PostProcessing/Runtime/Effects/MultiScaleVO.cs Line: 231)

UnityException: FindKernel failed
at (wrapper managed-to-native) UnityEngine.ComputeShader:FindKernel (string)
at UnityEngine.Rendering.PostProcessing.MultiScaleVO.PushDownsampleCommands (UnityEngine.Rendering.CommandBuffer cmd, UnityEngine.Camera camera, Nullable1 depthMap) [0x00085] in C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\Effects\MultiScaleVO.cs:231 at UnityEngine.Rendering.PostProcessing.MultiScaleVO.GenerateAOMap (UnityEngine.Rendering.CommandBuffer cmd, UnityEngine.Camera camera, RenderTargetIdentifier destination, Nullable1 depthMap, Boolean invert) [0x00082] in C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\Effects\MultiScaleVO.cs:162
at UnityEngine.Rendering.PostProcessing.MultiScaleVO.RenderAmbientOnly (UnityEngine.Rendering.PostProcessing.PostProcessRenderContext context) [0x0004a] in C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\Effects\MultiScaleVO.cs:468
at UnityEngine.Rendering.PostProcessing.PostProcessLayer.BuildCommandBuffers () [0x0012c] in C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\PostProcessLayer.cs:352
at UnityEngine.Rendering.PostProcessing.PostProcessLayer.OnPreCull () [0x00096] in C:\ProgramData\Unity\cache\packages\packages.unity.com\com.unity.postprocessing@2.0.3-preview\PostProcessing\Runtime\PostProcessLayer.cs:292

There were some bug fixes in our dev branch which was not present in 2017.4 branch.
After grafting these bug fixes in the 2017.4 branch, the latest version of PostProcessingStack is running fine.

Thanks for the reply, is good to know.