Problems with HTTP GET

Hello I am very new at this okta security thing and I am trying out some things.
I have server application:

@SpringBootApplication
@EnableEurekaServer
public class DiscoveryServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(DiscoveryServiceApplication.class, args);
    }

}
application.properties
server.port=8761
eureka.client.register-with-eureka=false

And then I have client application:

@SpringBootApplication
@EnableEurekaClient
public class SpringCloudGatewayApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringCloudGatewayApplication.class, args);
    }

    @Bean
    public RouteLocator customRouteLocator(RouteLocatorBuilder builder,
                                           TokenRelayGatewayFilterFactory filterFactory) {
        return builder.routes()
                .route("cart-service", r -> r.path("/cart")
                        .filters(f -> f.filter(filterFactory.apply()))
                        .uri("lb://cart-service"))
                .build();
    }

}
@EnableWebFluxSecurity
@EnableReactiveMethodSecurity
public class OktaOAuth2WebSecurity {

    @Bean
    public SecurityWebFilterChain securityWebFilterChain(ServerHttpSecurity http) {
        http.csrf().disable()
                .authorizeExchange()
                .anyExchange()
                .authenticated()
                .and().oauth2Login()
                .and().oauth2ResourceServer().jwt();
        return http.build();
    }
}
application.properties:
spring.main.allow-bean-definition-overriding=true
okta.oauth2.issuer=https://****
okta.oauth2.client-id=0oa2fm***
okta.oauth2.client-secret=rkdzVcNsrDgt0****
spring.application.name=gateway

And also I have microservice:

@SpringBootApplication
@EnableEurekaClient
public class ServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(ServiceApplication.class, args);
    }

}
@RestController
public class CartController {


    @GetMapping("/cart")
    @PreAuthorize("hasAnyRole('ADMIN', 'USER')")
    public @ResponseBody Cart cartInfo() {
        return new Cart("abir", "Dhaka");
    }
}
application properties:
spring.application.name=cart-service
server.port=8081
okta.oauth2.issuer=https://***
okta.oauth2.client-id=0oa2fm****
okta.oauth2.client-secret=rkdzVcNsr*****

But when I launch all these 3 applications I dont get the microservice result…
When I go to localhost:8080/cart I get whitelabel error page. and errors are: failed to resolve 'DESKTOP-1RUFLM8' after 2 queries, 500 Server Error for HTTP GET "/cart".
And I just cant find solution how to fix this… I would appreciate some help I can provide anything you need. Now I provided my three classes with application properties of these classes.