Request URL:http://web-arm:8080/admin
Request Method:GET
Status Code:404 /WEB-INF/jsp//admin/index.jsp

$('#listEmptyTemplates').load('/api/listofgames #message_content');   

@Controller
@RequestMapping(value = {FACADE_URL})
public class FacadeController {

    public static final String FACADE_URL = "/api";

    public static final String LIST_OF_GAMES = "/facade/listofgames";

    @Autowired
    private FacadeService facadeService;

    @RequestMapping(method = RequestMethod.GET,
            produces = {MediaType.TEXT_HTML_VALUE}, // отдает 
            value = "listofgames")
    public DeferredResult<ModelAndView> listOfGames() {
        final  DeferredResult<ModelAndView> deferredResult = new DeferredResult<>();
        ModelAndView modelAndView = new ModelAndView(LIST_OF_GAMES);

        Future<List<Game>> list1 = facadeService.getList1();
        Future<List<Game>> list2 = facadeService.getList2();
        
        try {
            modelAndView.addObject("list1", list1.get());
            modelAndView.addObject("list2", list2.get());
            deferredResult.setResult(modelAndView);
        } catch (InterruptedException | ExecutionException e) {
            deferredResult.setErrorResult(e);
        }
        
        return deferredResult;

    }

@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {

    @Bean(name = "jspViewResolver")
    public InternalResourceViewResolver jspViewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/jsp/");
        resolver.setSuffix(".jsp");
        resolver.setViewClass(JstlView.class);
        resolver.setOrder(1);
        return resolver;
    }

    public static final String LIST_OF_GAMES = "/facade/listofgames";

    public static final String LIST_OF_GAMES = "facade/listofgames";