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Authorization requires a cascading parameter of type Task\<AuthenticationState>. Consider using CascadingAuthenticationState to supply this.

 

add <CascadingAuthenticationState>

G:\x\src\Presentation\Admin\App.razor

<CascadingAuthenticationState>
    <Router AppAssembly="@typeof(Program).Assembly">
        <Found Context="routeData">
            <RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
        </Found>
        <NotFound>
            <LayoutView Layout="@typeof(MainLayout)">
                <p>Sorry, there's nothing at this address.</p>
            </LayoutView>
        </NotFound>
    </Router>
</CascadingAuthenticationState>