Crash when using SetVirtualHostMapping

Description

Crash when using SetVirtualHostMapping

Version
SDK: com.microsoft.mixedreality.webview.unity-0.17.1-pre.3.tgz
Runtime: Unity2020.3.33
Framework: Unity2020.3.33, MRTK2.8.3
OS: (Unity Editor) Windows 10 22H2, (Hololens2) 22621.1120.arm64fre.ni_release_svc_sydney_rel_prod.230707-1012

Regression
Was this working before but has regressed? > No.
If yes, what version did this last work on?

Repro Steps

1. Clone this repository.
   https://github.com/MicrosoftEdge/WebView2Samples/
2. Resolve compilation errors
   • Do "Restore Features" in Mixed Reality Feature Tool.
   • remove this line from package.json

     "com.unity.collab-proxy": "2.0.3",
     

3. Open this sample in UnityEditor.
   https://github.com/MicrosoftEdge/WebView2Samples/tree/main/GettingStartedGuides/HoloLens2_GettingStarted/HoloLens2GetStartedApp
4. Attach this script to "WebView"

using Microsoft.MixedReality.WebView;
using System;
using UnityEngine;

public class WebViewExample : MonoBehaviour
{
    private void Start()
    {
        var webViewComponent = gameObject.GetComponent<WebView>();

        webViewComponent.GetWebViewWhenReady((IWebView webView) =>
        {
            ((IWithVirtualHost)webView).SetVirtualHostMapping("webview2.sample", "Assets\\Html");

            // Navigate to our local content.
            // webViewComponent.Load(new Uri("http://webview2.sample/demo.html")); // comment out!!
        });
    }
}

source: https://learn.microsoft.com/en-us/microsoft-edge/webview2/get-started/hololens2#setvirtualhostnametofoldermapping-and-setvirtualhostmapping

6. And create a "{ProjectFolder}/Assets/Html/demo.html". (I don't think it matters)

7. When I run it, it crashes. (Both Editor and Hololens.)

Screenshots

Additional context

AB#45688087