Erro no Css Spring

Pessoal, boa noite.

No meu projeto, está ocorrendo um erro que ao acessar a página principal(http://localhost:8080/casadocodigo/) sem estar logado no sistema, a página não importa o css, apenas o HTML, alguém consegue me ajudar pois ao acompanhar o instrutor vi que esse erro não acontece no projeto dele, abaixo informações:

@EnableWebMvc
@ComponentScan(basePackageClasses= {HomeController.class, ProdutoDAO.class, FileSaver.class, CarrinhoCompras.class})
@EnableCaching
public class AppWebConfiguration extends WebMvcConfigurerAdapter {

    @Bean
    public InternalResourceViewResolver internalResourceViewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix( ".jsp");

        resolver.setExposedContextBeanNames("carrinhoCompras");

        return resolver;
    }

    @Bean
    public MessageSource messageSource(){
        ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
        messageSource.setBasename("/WEB-INF/messages");
        messageSource.setDefaultEncoding("UTF-8");
        messageSource.setCacheSeconds(1);
        return messageSource;
    }

    @Bean
    public FormattingConversionService mvcConversionService() {
        DefaultFormattingConversionService conversionService = 
                new DefaultFormattingConversionService();
        DateFormatterRegistrar registrar = new DateFormatterRegistrar();
        registrar.setFormatter(new DateFormatter("dd/MM/yyyy"));
        registrar.registerFormatters(conversionService);

        return conversionService;
    }

    @Bean
    public MultipartResolver multipartResolver(){
        return new StandardServletMultipartResolver();
    }

    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

    @Bean
    public CacheManager cacheManager() {
        CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder() 
                .maximumSize(100)
                .expireAfterAccess(5, TimeUnit.MINUTES);
        GuavaCacheManager manager = new GuavaCacheManager();
        manager.setCacheBuilder(builder);

        return manager;
    }

    @Bean
    public ViewResolver contentNegotiationViewResolver(ContentNegotiationManager manager){
        List<ViewResolver> viewResolvers = new ArrayList<>();
        viewResolvers.add(internalResourceViewResolver());
        viewResolvers.add(new JsonViewResolver());

        ContentNegotiatingViewResolver resolver = new ContentNegotiatingViewResolver();
        resolver.setViewResolvers(viewResolvers);
        resolver.setContentNegotiationManager(manager);
        return resolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/css", "/resources/imagens","resources/js");
    }    

}