MAUI WebView not loading content on some computer

[godboutj]

Hi,
We have an issue with our application that do Blazor into MAUI application with the following code:
<BlazorWebView x:Name="blazor_web_view" HostPage="wwwroot/Index.html"> <BlazorWebView.RootComponents> <RootComponent Selector="#app" ComponentType="{x:Type local:Main}" /> </BlazorWebView.RootComponents> </BlazorWebView>

The application is package with .msix with non validated certificate for development purpose (a true trusted certificate will be used for production later). This seem to work just fine for most people when they add our development certificate. But on some computer it doesn't load the WebView at all and the Windows log security filter the application.

For a while we were asking those users to do the following:

• Reset Edge browser settings
• Add the following entry into the regitry
• Computer/HKEY_LOCAL_MACHINE/SOFTWARE/Policies/Microsoft/Edge/ ADD "RenderingCodeIntegrityEnabled" DWORD (32 bits) value: 0
• Computer/HKEY_LOCAL_MACHINE/SOFTWARE/Policies/Microsoft/Edge/WebView2 ADD "RenderingCodeIntegrityEnabled" DWORD (32 bits) value: 0

This did fix it for a while. But with latest Windows, Edge updates, this no more work. What is the right way to make this work on all machine? We do not load any external web page, only our inner application. Any way to prevent this? Maybe some settings or signing that must be done?

Thanks,

[godboutj]

I try to put the webview into the highest verbose mode to catch some information, I only get a core process failed without much information on their platform:

2023-11-27 17:21:26.670 -05:00 [ERR] Main page constructor [START]
2023-11-27 17:21:26.675 -05:00 [ERR] Main page constructor [END]
2023-11-27 17:21:26.685 -05:00 [DBG] Creating file provider at content root 'wwwroot', using host page relative path 'Index.html'.
2023-11-27 17:21:26.688 -05:00 [ERR] Main page BlazorWebViewInitializing: env options additionnal args: 
2023-11-27 17:21:26.688 -05:00 [ERR] Main page BlazorWebViewInitializing: env options browser version: 
2023-11-27 17:21:26.688 -05:00 [ERR] Main page BlazorWebViewInitializing: browser exec folder: 
2023-11-27 17:21:26.688 -05:00 [ERR] Main page BlazorWebViewInitializing: user data folder: 
2023-11-27 17:21:26.750 -05:00 [DBG] Starting WebView2...
2023-11-27 17:21:26.777 -05:00 [DBG] Starting initial navigation to '/'.
2023-11-27 17:21:26.782 -05:00 [ERR] Main page on appearing [START]
2023-11-27 17:21:26.782 -05:00 [ERR] Main page on appearing [DONE]
2023-11-27 17:21:27.214 -05:00 [DBG] WebView2 is started.
2023-11-27 17:21:27.216 -05:00 [ERR] Main page BlazorWebViewInitialized: Microsoft.UI.Xaml.Controls.WebView2
2023-11-27 17:21:27.234 -05:00 [ERR] Main page CoreProcessFailed: reason: Unexpected
2023-11-27 17:21:27.234 -05:00 [ERR] Main page CoreProcessFailed: exit code: -1073740760
2023-11-27 17:21:27.235 -05:00 [ERR] Main page CoreProcessFailed: process description: 
2023-11-27 17:21:27.235 -05:00 [ERR] Main page CoreProcessFailed: kind: RenderProcessExited
2023-11-27 17:21:27.236 -05:00 [ERR] Main page CoreProcessFailed: Frame info: System.Collections.Generic.IReadOnlyListImpl`1[Microsoft.Web.WebView2.Core.CoreWebView2FrameInfo]

Seems like a security policy is preventing the WebView from loading the local resources into my MAUI application. It work on most desktop, but failed for a whole organisation. Any tips or requirements that should allow my application to run normally? Any firewall or anti virus options need to be made for this to work? Any NT domain policies should be white listed??? I do not load remote pages, only the local application in Blazor. Their IT seems clueless on why and they blame my application... We known the drift...

[godboutj]

After some investigation the error code is related to STATUS_INVALID_IMAGE_HASH
The registry edit does not seems to work for them anymore...