When I import LW SRP Samples this package in unity 2018.3.6f1 Then below error comes.
Shader properties can't be added to this global property sheet. Trying to add _GrabTexture_HDR (type 1 count 1) UnityEditor.AssetPreviewUpdater:CreatePreviewForAsset(Object, Object[], String)
Hello, can you confirm that you're using the latest ASE version and that you've extracted the LWSRPTemplates.unitypackage?
Please note that you'll need to extract the templates package whenever you update your ASE version, in order to update older versions of the templates.
We've just tested a clean Unity 2018.3.6f1 project with LW RP v4.1.0 and the latest ASE version and we're not getting those errors with the LW samples.
Apologies for the delay in our response, I've just tested your project and the error wasn't present, however, I've noticed that the LW templates were not extracted, and these are needed for the samples to work.
In order to be able to author shaders for the LW SRP versions 4.8.0 through 4.10.0, you'll need to first extract the following package so that the necessary shader templates are made available: