Asp.net Core 6 logout does not work, only redirecting to a page that does not exist

currently I'm trying to get the logout working in my Asp.Net Core 6 Blazor Server application.

Login is working fine. But logging out redirects to the login url with a redirect to the logout

I call the logout POST the following:(This is in a .razor file)

<form method="post" action="Identity/Account/LogOut" asp-area="Identity"><MudButton ButtonType="ButtonType.Submit" Variant="Variant.Outlined" Color="Color.Info">        Ausloggen</MudButton></form>

The url that gets called is: https://localhost:7172/Account/Login?ReturnUrl=%2FIdentity%2FAccount%2FLogOut

I haven't changed the scaffolded Logout.cshtml file.

I'm registering my Identity like this:

builder.Services.AddDefaultIdentity<WaWiIdentityUser>(options =>{    options.SignIn.RequireConfirmedAccount = true;    options.User.AllowedUserNameCharacters = "äabcdefghijklmnöopqrstüuvwxyzÄABCDEFGHIJKLMNÖOPQRSTÜUVWXYZ0123456789ß-._@+/ ";    })    .AddRoles<WaWiIdentityRole>()    .AddEntityFrameworkStores<WaWiIdentityContext>()    .AddDefaultUI()    .AddDefaultTokenProviders()    .AddUserManager<UserManager<WaWiIdentityUser>>()    .AddSignInManager<WaWiSignInManager>()    .AddRoleManager<RoleManager<WaWiIdentityRole>>();    builder.Services.AddAuthentication("Identity.Application").AddCookie();

The Authentication cookie does not get deleted and the default redirect is not getting called.

This is the default logout I'm using. I tried logging, but the method does not event get called as far as i can tell

@functions {public async Task<IActionResult> OnPost(){    if (SignInManager.IsSignedIn(User))    {        await SignInManager.SignOutAsync();    }    return Redirect("/");}

}

Do I miss something here?

Thanks ahead for your help.