hdrp post process layer issue. followed a substance video.

Using unity 2018.3.4f1 with hdrp 4.9.0 and post processing 2.1.3

I am following the video from substance.

when I go to add the post process layer I get the error. and all meshes disappear from viewport.
I followed everything they did. up to the point at 19:20min, where i got the error.

I can upload the project if needed to help the team solve the issue so we can get this fixed in later builds.

Shader error in ‘Hidden/PostProcessing/Uber’: failed to open source file: ‘…/StdLib.hlsl’ at line 21 (on d3d11)

Compiling Vertex program with FINALPASS
Platform defines: UNITY_ENABLE_REFLECTION_BUFFERS UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS UNITY_PBS_USE_BRDF1 UNITY_SPECCUBE_BOX_PROJECTION UNITY_SPECCUBE_BLENDING UNITY_ENABLE_DETAIL_NORMALMAP SHADER_API_DESKTOP UNITY_LIGHT_PROBE_PROXY_VOLUME UNITY_LIGHTMAP_FULL_HDR

windows 10, nvidia driver 417.71 if that matters.

Hi, do you have a local postprocess package ? (i.E in the Asset folder) ? HDRP download it with the package manager in package.

I fixed by selecting all the shaders in the package and hit reimport.