権限ごとにページ遷移をしたいです。

前提・実現したいこと

ログイン成功時、権限ごとに遷移ページを変えたくてAutenticationSuccessHandlerを実装しました。
”MAKER"なら/maker/index.htmlへ
"ANSWERER"なら/answerer/index.htmlへ
遷移するようにしたいです。

発生している問題・エラーメッセージ

ログインしたら真っ白なページになってしまします。

該当のソースコード

Java
1@Configuration
2@EnableWebSecurity
3public class WebSecurityConfig extends WebSecurityConfigurerAdapter{
4	@Autowired
5	private SuccessHandler successHandler;
6	
7	public void configure(WebSecurity web) {
8		web.ignoring().antMatchers("/css/**","/html/**");
9	}
10	@Bean
11	SuccessHandler successHandler() {
12		return new SuccessHandler();
13	}
14	
15
16	@Override
17	protected void configure(HttpSecurity http) throws Exception {
18		http.authorizeRequests()
19			.antMatchers("/maker/**").hasRole("MAKER")
20			.antMatchers("/answerer/**").hasRole("ANSWERER")
21			.and()
22			.formLogin().loginPage("/login").successHandler(successHandler).permitAll()
23			.and()
24			.logout().logoutSuccessUrl("/");
25		
26		
27	}
28	@Bean
29	public UserDetailsManager userDetailsManager(DataSource dataSource) {
30		return new JdbcUserDetailsManager(dataSource);
31	}
32	public class SuccessHandler implements AuthenticationSuccessHandler{
33
34		@Override
35		public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
36				Authentication authentication) throws IOException, ServletException {
37			Set<String> roles=AuthorityUtils.authorityListToSet(authentication.getAuthorities());
38			if(roles.contains("MAKER")) {
39				response.sendRedirect(request.getContextPath()+"/maker");
40			}else if(roles.contains("ANSWERER")) {
41				response.sendRedirect(request.getContextPath()+"/answerer");
42			}
43		}
44
45	}
46}

Java
1@Controller
2@RequestMapping("/maker")
3public class MakerController {
4	@Autowired
5	private MakerService makerService;
6	
7	@ModelAttribute("maker")
8	public Maker currentMaker(Account account) {
9		return account.getMaker();
10	}
11	
12	@GetMapping("")
13	public String index() {
14		return "maker/index";
15	}

xml
1<?xml version="1.0" encoding="UTF-8"?>
2<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
3	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
4	<modelVersion>4.0.0</modelVersion>
5	<parent>
6		<groupId>org.springframework.boot</groupId>
7		<artifactId>spring-boot-starter-parent</artifactId>
8		<version>2.2.12.RELEASE</version>
9		<relativePath/> <!-- lookup parent from repository -->
10	</parent>
11	<groupId>jp.kuroda.spring</groupId>
12	<artifactId>makeSurvey</artifactId>
13	<version>0.0.1-SNAPSHOT</version>
14	<name>makeSurvey</name>
15	<description>Demo project for Spring Boot</description>
16	<properties>
17		<java.version>1.8</java.version>
18	</properties>
19	<dependencies>
20		<dependency>
21			<groupId>org.springframework.boot</groupId>
22			<artifactId>spring-boot-starter-data-jpa</artifactId>
23		</dependency>
24		<dependency>
25			<groupId>org.springframework.boot</groupId>
26			<artifactId>spring-boot-starter-security</artifactId>
27		</dependency>
28		<dependency>
29			<groupId>org.springframework.boot</groupId>
30			<artifactId>spring-boot-starter-thymeleaf</artifactId>
31		</dependency>
32		<dependency>
33			<groupId>org.springframework.boot</groupId>
34			<artifactId>spring-boot-starter-web</artifactId>
35		</dependency>
36		<dependency>
37			<groupId>org.thymeleaf.extras</groupId>
38			<artifactId>thymeleaf-extras-springsecurity5</artifactId>
39		</dependency>
40
41		<dependency>
42			<groupId>org.springframework.boot</groupId>
43			<artifactId>spring-boot-devtools</artifactId>
44			<scope>runtime</scope>
45			<optional>true</optional>
46		</dependency>
47		<dependency>
48			<groupId>com.h2database</groupId>
49			<artifactId>h2</artifactId>
50			<scope>runtime</scope>
51		</dependency>
52		<dependency>
53			<groupId>mysql</groupId>
54			<artifactId>mysql-connector-java</artifactId>
55			<scope>runtime</scope>
56		</dependency>
57		<dependency>
58			<groupId>org.projectlombok</groupId>
59			<artifactId>lombok</artifactId>
60			<optional>true</optional>
61		</dependency>
62		<dependency>
63			<groupId>org.springframework.boot</groupId>
64			<artifactId>spring-boot-starter-test</artifactId>
65			<scope>test</scope>
66			<exclusions>
67				<exclusion>
68					<groupId>org.junit.vintage</groupId>
69					<artifactId>junit-vintage-engine</artifactId>
70				</exclusion>
71			</exclusions>
72		</dependency>
73		<dependency>
74			<groupId>org.springframework.security</groupId>
75			<artifactId>spring-security-test</artifactId>
76			<scope>test</scope>
77		</dependency>
78		<dependency>
79			<groupId>nz.net.ultraq.thymeleaf</groupId>
80			<artifactId>thymeleaf-layout-dialect</artifactId>
81		</dependency>
82	</dependencies>
83
84	<build>
85		<plugins>
86			<plugin>
87				<groupId>org.springframework.boot</groupId>
88				<artifactId>spring-boot-maven-plugin</artifactId>
89				<configuration>
90					<excludes>
91						<exclude>
92							<groupId>org.projectlombok</groupId>
93							<artifactId>lombok</artifactId>
94						</exclude>
95					</excludes>
96				</configuration>
97			</plugin>
98		</plugins>
99	</build>
100
101</project>