Unable to redirect uri after cas authentication with WSO2 provider using asp.net core authorization - authenticationchallenge

Question

[enter image description here][1]I am trying to authenticate my .net core application using cas with Wso2 identity provider although the autentication is succesful but on redirect uri i am getting webpage not found error with cas ticket not able to figure out what is the issue any guidance would be helpful
builder.Services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
.AddCookie(options =>
{
options.LoginPath = "/Login";
options.Events.OnSigningOut = context =>
{
var redirectContext = new RedirectContext<CookieAuthenticationOptions>(
context.HttpContext,
context.Scheme,
context.Options,
context.Properties,
"/"
);
if (builder.Configuration.GetValue("Authentication:CAS:SingleSignOut", false))
{
// Single Sign-Out
var casUrl = new Uri(builder.Configuration["Authentication:CAS:ServerUrlBase"]);
var links = context.HttpContext.RequestServices.GetRequiredService<LinkGenerator>();
var serviceUrl = context.Properties.RedirectUri ?? links.GetUriByPage(context.HttpContext, "/Index");
redirectContext.RedirectUri = UriHelper.BuildAbsolute(
casUrl.Scheme,
new HostString(casUrl.Host, casUrl.Port),
casUrl.LocalPath, "/logout",
QueryString.Create("service", serviceUrl!));
}
context.Options.Events.RedirectToLogout(redirectContext);
return Task.CompletedTask;
};
})
.AddCAS(o =>
{
o.CasServerUrlBase = builder.Configuration["Authentication:CAS:ServerUrlBase"]; // Set in `appsettings.json` file.
o.SignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;
o.CasValidationUrl = "/";
});
Login controller
[HttpGet("login")]
public IActionResult Login(string returnUrl)
{
// var props = new AuthenticationProperties { RedirectUri = "/" };
return Challenge(new AuthenticationProperties { RedirectUri = returnUrl }, "CAS");
// return Redirect("http://localhost:5095/");
}
[Web Response](https://i.stack.imgur.com/1LFOP.png)
[1]: https://i.stack.imgur.com/v3fKm.png