NullReferenceException thrown on importing VisualEffectGraph Additions

Steps to Repro:

1. Create a new Project in URP Template
2. Update URP Package to 10.0.0-preview.26
3. Import Visual Effect Graph 10.0.0-preview.27
4. Import VisualEffectGraph Additions from Sample of the VFX package

Expected Result: VisualEffectGraph Additions imported successfully

Actual Result: NullReference exception thrown

Reproducible on: 8.1.0, 8.2.0, 9.0.0-preview.55, 10.0.0-preview.27 with 2020.1.7f1, 2020.2.0b4

Environment: Windows 10 and Mac 10.15

Stack trace:
Exception while sanitizing model: Flames of type UnityEditor.VFX.VFXSubgraphContext: System.NullReferenceException: Object reference not set to an instance of an object
at UnityEditor.VFX.VFXSubgraphContext.RecreateCopy () [0x000e5] in /Users/Admin/Desktop/Amruta/Project/b4 urp n/library/packagecache/com.unity.visualeffectgraph@10.0.0-preview.27/editor/models/contexts/vfxsubgraphcontext.cs:199
at UnityEditor.VFX.VFXSubgraphContext.Sanitize (System.Int32 version) [0x00007] in /Users/Admin/Desktop/Amruta/Project/b4 urp N/Library/PackageCache/com.unity.visualeffectgraph@10.0.0-preview.27/Editor/Models/Con