-Node Setting window appears blank.
-ArgumentException on creating a new node, saving shader Graph and dragging any node to Graph editor.
-Unable to delete Virtual Texture and Sample Virtual Texture node.
-Unable to Save Shader Graph.
-There is no workaround.

Steps to repro:
1. Create a new HDRP template project
2. Project Window > Click on "+" > Shader > HDRP > StackLit Graph.
3. Open Graph > Blackboard > Virtual Texture > Drag in Graph Editor.
4. Assign to Sample Virtual Texture > Select Sample Virtual Texture.
5. Graph Inspector > Node Settings > Enable/Disable Automatic Streaming.
6. Assign out(3) to Bent Normal.
7. Save Assets > Enable/Disable Automatic Streaming.
8. Graph Inspector > Node Settings.

Actual Result:
NullReferenceException is thrown in the console.

Expected Result:
No error in the console.

Reproducible in:
2020.2.0a21, 2020.2.0a20 with Package version 10.0.0-preview.27, 9.0.0-preview33.
2020.2.0a19, 2020.2.0a1, 2020.1.3f1, 2020.1.0b13 with Package version 9.0.0-preview33.

Note:
-Virtual Texture node introduced in Shader Graph from 9.0.0-preview33.
-Refer attached stack trace.

Environment:
Occurring on Windows 10 & Mac 10.15.