Steps to reproduce:

1. Create a new URP project.
2. Window > Package Manager > Shader Graph > Samples, import Feature Examples.
3. Observe the console.

Actual results: ~22 errors on import 6000.0.4f1 and below. ~51 errors 6000.0.5f1 and above - see UUM-75818. This ticket focuses on the ~22 errors.

Expected results: No errors.

Reproducible with versions: 6000.0.11f1(17.0.3), 2023.3.0b4 (17.0.2)

Not reproducible with versions: 2022.3.35f1 (14.0.11)

Can't test with versions: 2023.3.0b3 (17.0.2), 2021.3.40f1 (12.1.15), no Feature Examples available.

Tested on (OS): MacOS Intel - 12.7.4

Notes:

• These are all reproducible as part of UUM-75818, but have an earlier FAV.

The majority of the error messages are similar to:
{code:java}
Shader Graph at Assets/Samples/Shader Graph/17.0.2/Feature Examples/VertexAnimation/Billboard/Billboard.shadergraph has 1 error(s), the first is: Validation: Could not find Sub Graph asset with GUID c4d56d46ea6e8414984dd9f58e0619f7.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&){code}
There is also:
{code:java}
Problem detected while importing the Prefab file: 'Assets/Samples/Shader Graph/17.0.2/Feature Examples/Prefabs/UV Projection.prefab'. The file might be corrupt or have a missing Variant parent or nested Prefabs. See details below. Errors: Prefab instance problem: 'MatCapTeapot (Missing Prefab with guid: 5f4db48dcd00239458dc5a33e79548b7)'. 2 instances are missing the same Prefab Asset with guid 5f4db48dcd00239458dc5a33e79548b7. Nested Prefab problem. Missing Nested Prefab Asset: 'PlatformProcedural (Missing Prefab with guid: 8c286bfd53914ce45b4d9eeaa086f505)' Prefab instance problem: 'InfoStand Flip Book (Missing Prefab with guid: 96048391e5bc0af49b1edfa6e3a2427c)'. 7 instances are missing the same Prefab Asset with guid 96048391e5bc0af49b1edfa6e3a2427c. Nested Prefab problem. Missing Nested Prefab Asset: 'InfoPanel UV Projection (Missing Prefab with guid: c4058e53767c32445a7b7cb7c5bc3dad)'   UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&){code}
 And:
{code:java}
Missing UnityEditor.ShaderGraph.SubTarget b844ef3864e3479fbb65c83c4867b45e
UnityEditor.AssetDatabase:Refresh ()
SampleDependencyImporter:LoadAssetDependencies (string) (at ./Library/PackageCache/com.unity.render-pipelines.core/Editor/SampleDependencyImportSystem/SampleDependencyImporter.cs:131)
SampleDependencyImporter/SamplePostprocessor:OnPostprocessAllAssets (string[],string[],string[],string[]) (at ./Library/PackageCache/com.unity.render-pipelines.core/Editor/SampleDependencyImportSystem/SampleDependencyImporter.cs:42)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:219){code}