Whitelabel Error Page

[LuizSorrentino]

Bom dia,

Não é a a primeira vez que esse erro acontece mesmo eu seguindo todos os passo a passo, eu não faço ideia do que ocorre e já não sei o que fazer.
"
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Wed Oct 16 10:59:23 BRT 2024
There was an unexpected error (type=Not Found, status=404).
"
O curioso é que não apresenta nenhum erro no terminal, então não há como rastrear.

Meu codigo das principais e referente ao caso

package springjpa.controller;

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
import springjpa.model.User;
import springjpa.repository.UserRepository;
import springjpa.service.UserService;

import java.net.URI;
import java.util.List;

@RestController
@RequestMapping(value = "/users")
public class UserController {

private final UserService userService;
private final UserRepository userRepository;

public UserController(UserService userService, UserRepository userRepository) {
    this.userService = userService;
    this.userRepository = userRepository;
}

@GetMapping("/{id}")
public ResponseEntity<User> findById(@PathVariable Long id) {
    var user = userService.findById(id);
    return ResponseEntity.ok(user);
}

@PostMapping()
public ResponseEntity<User> create(@RequestBody User userToCreate) {
    var userCreated = userService.create(userToCreate);
    URI location = ServletUriComponentsBuilder.fromCurrentRequest()
            .path("/{id}")
            .buildAndExpand(userCreated.getId())
            .toUri();

    return ResponseEntity.created(location).body(userCreated);
}

@DeleteMapping
public ResponseEntity<User> deleteById(@RequestBody User userToDelete) {
    userService.deleteById(userToDelete.getId());
    return ResponseEntity.noContent().build();
}

@GetMapping
public List<User> findAll() {
    return userService.findAll();
}

@PutMapping()
public ResponseEntity<User> update(@RequestBody User userToUpdate) {
    return null;
}

}

do repository

package springjpa.repository;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import springjpa.model.User;

@repository
public interface UserRepository extends JpaRepository<User, Long> {

}

da implementação
package springjpa.service.impl;

import org.springframework.stereotype.Service;
import springjpa.model.User;
import springjpa.repository.UserRepository;
import springjpa.service.UserService;
import java.util.List;
import java.util.NoSuchElementException;

@service
public class UserServiceImpl implements UserService {

private final UserRepository userRepository;

public UserServiceImpl(UserRepository userRepository) {
    this.userRepository = userRepository;
}

@Override
public User findById(Long id) {
    return userRepository.findById(id).orElseThrow(NoSuchElementException::new);
}

@Override
public User create(User userToCreate) {
    if (userToCreate.getId() != null && userRepository.existsById(userToCreate.getId())) {
        throw new IllegalArgumentException("User ID already exists!");
    }
    return userRepository.save(userToCreate);
}

@Override
public List<User> findAll() {

    return null;
}

@Override
public User save(User user) {
    userRepository.save(user);
    return user;
}

só não tenho o yml ainda, mas pelo que sei ele serve apenas pra ter acesso a tabela correto