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Cannot navigate to localhost #128

scegg opened this issue Jun 11, 2019 · 1 comment


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@scegg scegg commented Jun 11, 2019

I'm submitting a...

  • Bug report (I searched for similar issues and did not find one)

Current behavior

While navigating to localhost site with IsPrivateNetworkClientServerCapabilityEnabled set to true, nothing happened, blank displaying with no DOMContentLoaded raised.

It's similar like set IsPrivateNetworkClientServerCapabilityEnabled to true between BeginInit and EndInit in Winform. Reported here.

Expected behavior

Works like Edge or other web browsers.

Minimal reproduction of the problem with instructions



Nuget Package(s): Microsoft.Toolkit.Wpf.UI.Controls.WebView 5.1.1

Package Version(s):

Windows 10 Build Number:

  • Insider Build (build number: 18912)

App min and target version:

  • Insider Build (18912)

Device form factor:

  • Desktop

Visual Studio

  • 2019

NetFx 4.8

Codes for test:


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@r0x0r r0x0r commented Jun 22, 2019

As a workaround you can execute this command as an administrator. This will allow EdgeHTML to access localhost URLs.

checknetisolation LoopbackExempt -a -n="Microsoft.Win32WebViewHost_cw5n1h2txyewy"

The program needs to be run only once. It is a clutch, but I so far have not found a better solution.

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