How to reproduce:
1. Open an empty project and install Visual Effect Graph
2. Create a new Visual Effect Graph and double-click it to open it
3. Observe the VFX Graph Window, Console, and Windows prompt

Actual result: Errors are thrown in the Console, the Windows menu opens to choose a program with which to open the unrecognized file, default VFX Graph prompt is left in the VFX Graph Window to create a new VFX Graph
Expected result: Double-clicking the VFX Graph file opens the VFX Graph Window, no errors are thrown, and no "Create a VFX Graph" prompt stays in the said window, and no Windows menu pops up to choose with which program to open the .vfx file

Reproducible with: 2023.2.0a9, 2023.2.0a15
Not reproducible with: 2020.3.47f1, 2021.3.24f1, 2022.2.17f1, 2023.1.0b16, 2023.2.0a8

First lines of errors:
Exception thrown while invoking [OnOpenAssetAttribute] method 'VisualEffectAssetEditor:OnOpenVFX
NullReferenceException: Object reference not set to an instance of an object

Reproduced on: Windows 11