[Bug] Erro 500 ao tentar o usar GET no postman

Classe GatewayApplication

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableEurekaClient
public class GatewayApplication {

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

}

Arquivo application.properties

server.port=8082

eureka.client.serviceUrl.defaultZone=http://localhost:8081/eureka

spring.application.name=gateway
spring.cloud.gateway.discovery.locator.enabled=true
spring.cloud.gateway.discovery.locator.lowerCaseServiceId=true