Tried to add Unity 2019.2: spine.lwrp-shaders 3.8 but received 2 errors:
Shader error in 'Lightweight Render Pipeline/Spine/Sprite': failed to open source file: 'Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl' at SpineCoreShaders/ShaderShared.cginc(8) (on metal)
Shader error in 'Lightweight Render Pipeline/Spine/Skeleton Lit': failed to open source file: 'Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl' at SpineCoreShaders/ShaderShared.cginc(8) (on metal)
Unity Version: 2019.2.17f1
Lightweight RP: 6.9.2