Added corsConfigurationSource and still an error "has been blocked by CORS policy"

I'm trying to connect Spring Security to my project. Created the Security Config class

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    private final JwtTokenProvider jwtTokenProvider;

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
    
    public SecurityConfig(JwtTokenProvider jwtTokenProvider) {
        this.jwtTokenProvider = jwtTokenProvider;
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .httpBasic().disable()
                .cors().and().csrf().disable()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                .antMatchers("/auth/api/v1/user/register").permitAll()
                .antMatchers("/auth/api/v1/admin/*").hasRole("ADMIN")
                .anyRequest().authenticated()
                .and()
                .apply(new JwtConfigurer(jwtTokenProvider));
    }
}

I am sending a request from the browser for registration

http://localhost:15001/auth/api/v1/user/register

and I get an answer:

Access to XMLHttpRequest at 'http://localhost:15001/auth/api/v1/user/register' from origin 'http://localhost:4200' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

According to the Spring documentation, I add the corsConfigurationSource method:

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    private final JwtTokenProvider jwtTokenProvider;

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
    
    public SecurityConfig(JwtTokenProvider jwtTokenProvider) {
        this.jwtTokenProvider = jwtTokenProvider;
    }

    @Bean
    CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(Arrays.asList("http://localhost:4200"));
        configuration.setAllowedMethods(Arrays.asList("GET","POST"));
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .httpBasic().disable()
                .cors().and().csrf().disable()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                .antMatchers("/auth/api/v1/user/register").permitAll()
                .antMatchers("/auth/api/v1/admin/**").hasRole("ADMIN")
                .anyRequest().authenticated()
                .and()
                .apply(new JwtConfigurer(jwtTokenProvider));
    }
}

I am sending a request from the browser for registration

http://localhost:15001/auth/api/v1/user/register

and I still get the same error

Access to XMLHttpRequest at 'http://localhost:15001/auth/api/v1/user/register' from origin 'http://localhost:4200' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Why didn't the error disappear?

I know there is another way to add on the controller

@CrossOrigin(origins="http://localhost:4200″)

You can also add to the header. but I want to figure out why this method doesn't work.

pom.xml

<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.4.12</version>
    <relativePath/>
</parent>

<dependencies>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
  </dependency>

  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
  </dependency>

  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
  </dependency>

  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
  </dependency>

  <dependency>
    <groupId>com.auth0</groupId>
    <artifactId>java-jwt</artifactId>
    <version>${jwt.version}</version>
  </dependency>
  <dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <version>${postgres.version}</version>
  </dependency>

  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
  </dependency>
</dependencies>

Here is the code where I form the answer

final UserDto userDto = userToUserDtoConverter.convert(optionalUser.get());
if (password.equals(UserUtils.encryptText(optionalAuth.get().getPassword()))) {
  final HttpHeaders responseHeaders = new HttpHeaders();
  final String token = jwtTokenProvider.createToken(optionalAuth.get().getName());
  return confirmUserRegister(userDto, "Пользователь авторизован",
    HttpStatus.OK, responseHeaders);
}

protected ResponseEntity<DataResponse<UserDto>> confirmUserRegister(
    UserDto userDto, String message, HttpStatus httpStatus, HttpHeaders responseHeaders) {
  final DataResponse<UserDto> response = new DataResponse<>();
  response.setStatus(StatusType.SUCCESSFUL);
  response.setData(userDto);
  response.addMessage(httpStatus.value(), message);
  return new ResponseEntity<>(response, responseHeaders, httpStatus);
}

Here is the link to the project enter link description here

The project is still very raw. And this is a copy of the project, so you can edit as you like