Adding the "Previous Position Binder" component causes the editor to throw NullReferenceException, refer to the attached video.

Steps to repro:
1. Create a new project
2. Windows > Package Manager > Visual Effects Graph > Install
3. Hierarchy >right-click > Create Empty
4. Add "Previous Position Binder" component in the Inspector

Actual Result:
NullReferenceException is thrown on adding the "Previous Position Binder" component.

Expected Result:
"Previous Position Binder" component is added without any errors.

Reproducible in:
2020.2.0a9, 2020.1.0b8, 2019.3.0f3 with Package Version 9.0.0, 8.1.0, 8.0.1, 7.3.1, 7.1.8.

Environment:
Windows 10 & macOS 10.14

Stack trace:
NullReferenceException: Object reference not set to an instance of an object
UnityEngine.VFX.Utility.VFXPreviousPositionBinder.OnEnable () (at library/packagecache/com.unity.visualeffectgraph@9.0.0-preview.13/runtime/utilities/propertybinding/implementation/vfxpreviouspositionbinder.cs:17)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)