Edit C:\Windows\Microsoft.NET\Framework\v4.0.30319\ASP.NETWebAdminFiles\web.config

Edit C:\Windows\Microsoft.NET\Framework\v4.0.30319\ASP.NETWebAdminFiles\web.config

<configuration>
    <system.web>
        <compilation targetFramework="4.5" />
        <membership>
            <providers>
                <add name="WebAdminMembershipProvider" type="System.Web.Administration.WebAdminMembershipProvider" />
            </providers>
        </membership>
        <httpModules>
            <add name="WebAdminModule" type="System.Web.Administration.WebAdminModule"/>
        </httpModules>
        <authentication mode="Windows"/>
        <authorization>
            <deny users="?"/>
        </authorization>
        <identity impersonate="true"/>
       <trust level="Full"/>
       <pages validateRequest="true"/>
       <globalization uiCulture="auto:en-US" />
    </system.web>
    <system.webServer>
        <modules>
            <add name="WebAdminModule" type="System.Web.Administration.WebAdminModule" preCondition="managedHandler" />
        </modules>
        <validation validateIntegratedModeConfiguration="false" />
    </system.webServer>
</configuration>

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