Dotnet Core 2.0 Authorization failed for user: (null)

My code was working perfectly with .net core 2.0. I'm not sure what went wrong. Application is throwing error during authorization. Error message and startup class code below.

> Microsoft.AspNetCore.Cors.Infrastructure.CorsService:Information: 

Policy execution successful.

info: Microsoft.AspNetCore.Authorization.DefaultAuthorizationService[2] Authorization failed for user: (null). Microsoft.AspNetCore.Authorization.DefaultAuthorizationService:Information: 

Authorization failed for user: (null). info: Microsoft.AspNetCore.Authorization.DefaultAuthorizationService[2] Authorization failed for user: (null). Microsoft.AspNetCore.Authorization.DefaultAuthorizationService:Information: Authorization failed for user: (null). info: Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker[3] Authorization failed for the request at filter 'Microsoft.AspNetCore.Mvc.Authorization.AuthorizeFilter'. Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker:Information: Authorization failed for the request at filter 'Microsoft.AspNetCore.Mvc.Authorization.AuthorizeFilter'. info: Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker[3] Authorization failed for the request at filter 'Microsoft.AspNetCore.Mvc.Authorization.AuthorizeFilter'. Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker:Information: Authorization failed for the request at filter 'Microsoft.AspNetCore.Mvc.Authorization.AuthorizeFilter'. Microsoft.AspNetCore.Mvc.ChallengeResult:Information: Executing ChallengeResult with authentication schemes ().

namespace API { public class Startup { public IConfigurationRoot Configuration { get; } public void ConfigureScopeServices(IServiceCollection services) { services.AddDbContext<AppDbContext>(options => options.UseMySql(Configuration.GetConnectionString("Default"))); } public void ConfigureCompressionService(IServiceCollection services) { services.Configure<GzipCompressionProviderOptions>(options => options.Level = CompressionLevel.Fastest); services.AddResponseCompression(options => { options.Providers.Add<GzipCompressionProvider>(); }); } public void ConfigureJWTService(IServiceCollection services) { JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear(); var tokenValidationParameters = new TokenValidationParameters { ValidateIssuerSigningKey = true, IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration.GetSection("ApplicationConfiguration:TokenOptions:SigningKey").Value)), ValidateIssuer = true, ValidIssuer = Configuration.GetSection("ApplicationConfiguration:TokenOptions:Issuer").Value, ValidateAudience = true, ValidAudience = Configuration.GetSection("ApplicationConfiguration:TokenOptions:Audience").Value, ValidateLifetime = true, NameClaimType = JwtRegisteredClaimNames.Sub, RoleClaimType = "Roles" }; services.AddAuthentication(options => { options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme; options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme; }) .AddJwtBearer(o => { o.TokenValidationParameters = tokenValidationParameters; }); } public void ConfigureServices(IServiceCollection services) { this.ConfigureScopeServices(services); this.ConfigureCompressionService(services); this.ConfigureJWTService(services); services.Configure<ApplicationConfiguration>(Configuration.GetSection("ApplicationConfiguration")); //Customized Response Object to Map MiddleWare Response Object var formatterSettings = JsonSerializerSettingsProvider.CreateSerializerSettings(); formatterSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore; ResponseFormatter formatter = new ResponseFormatter(formatterSettings, ArrayPool<Char>.Create()); services.AddMvcCore() .AddApiExplorer() .AddAuthorization() .AddFormatterMappings() .AddDataAnnotations() .AddJsonFormatters() .AddCors() .AddMvcOptions( options => { options.OutputFormatters.RemoveType<JsonOutputFormatter>(); options.OutputFormatters.Insert(0, formatter); } ); } public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory) { loggerFactory.AddConsole(Configuration.GetSection("Logging")); loggerFactory.AddDebug(); app.UseCors( builder => builder .AllowAnyOrigin() .AllowAnyMethod() .AllowAnyHeader() .AllowCredentials() ); app.UseMvc(); app.UseResponseCompression(); } } }