the oauth state was missing or invalid - asp.net

Question

I am trying to implement google authentication in asp.net 5 and getting error
Exception: The oauth state was missing or invalid.
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<ManualDataMiningManagerContext>(
options => options.UseSqlServer("name=ConnectionStrings:DBconnection"));
services.AddIdentity<ApplicationUser, IdentityRole>()
.AddDefaultUI()
.AddEntityFrameworkStores<ManualDataMiningManagerContext>()
.AddDefaultTokenProviders();
services.AddRazorPages();
services.AddControllersWithViews();
services.AddAuthentication()
.AddCookie(CookieAuthenticationDefaults.AuthenticationScheme)
.AddGoogle(options =>
{
IConfigurationSection googleAuthNSection =
Configuration.GetSection("Authentication:Google");
options.ClientId = googleAuthNSection["ClientId"];
options.ClientSecret = googleAuthNSection["ClientSecret"];
options.SignInScheme = IdentityConstants.ExternalScheme;
});
services.ConfigureExternalCookie(options => { options.Cookie.SameSite = SameSiteMode.None; });
services.Configure<ForwardedHeadersOptions>(options =>
{
options.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
options.KnownNetworks.Clear();
options.KnownProxies.Clear();
});
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseForwardedHeaders();
app.UseHsts();
}
else
{
app.UseExceptionHandler("/Home/Error");
app.UseForwardedHeaders();
//The default HSTS value is 30 days.You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapRazorPages();
endpoints.MapDefaultControllerRoute();
});
}
my startup class method attached. am I missing anything?
and one more thing this app deployed on subdomain looks like operation-done.abc.com