NullReferenceException Error is logged when selecting the OpenXR Settings panel in Project Settings right after installing it from the XR Plug-In Management panel

Steps to reproduce:

1. Create any Project
2. Navigate to Project Settings > XR Plug-in Management
3. Install the XR Plug-in Management Package
4. Enable the OpenXR Plug-in
5. Select the "OpenXR" Settings panel on the left hand side of the Project Settings Window

Actual results: Error "NullReferenceException: Object reference not set to an instance of an object
UnityEditor.XR.Management.XRConfigurationProvider.OnGUI (System.String searchContext) (at ./Library/PackageCache/com.unity.xr.management@20be87dea580/Editor/XRConfigurationProvider.cs:103)" is logged the first time the OpenXR Settings panel is selected in the Project Settings

Expected results: No Error is logged

Reproducible with versions: 4.5.1 (2022.3.61f1, 6000.1.0b14, 6000.2.0a8)

Not reproducible with versions: 4.5.1 (6000.0.45f1) (Couldn't reproduce it here with the same Package version)

Tested on (OS): Windows 11

Note: Error is clearable and doesn't appear again after selected the Settings panel a second time, but might reproduce if the Panel is selected before closing and reopening the Editor