Why is the function not executed and it is not possible to get data from the database?

Question

JavaScript

Good afternoon! There was a problem with requests.
There is a function on the client side - it works fine:

fetchMeetups({commit, state}, options = {}) {
            commit('setItems', {resource: 'meetups', items: []}, {root: true})

            const url = applyFilters('api/v1/meetups', options.filter)
            debugger
            return axios.get(url)
                .then(res =>{
                    const meetups = res.data
                    commit('setItems', {resource: 'meetups', items: meetups}, {root: true})
                    return state.items
                })
                .catch(err => console.log(err))
        }

url can be of 3 types:

• /api/v1/meetups
  
• /api/v1/meetups?location=shostkaua
  
• /api/v1/meetups?location=shostkaua&category=dance
  

Routes:

const express = require('express');
const router = express.Router();

const MeetupsCtrl = require('../controllers/meetups');
const AuthCtrl = require('../controllers/auth')

router.get('', MeetupsCtrl.getMeetups);
router.get('/secret', AuthCtrl.onlyAuthUser, MeetupsCtrl.getSecret);
router.get('/:id', MeetupsCtrl.getMeetupById);
// Post Route
router.post('', AuthCtrl.onlyAuthUser, MeetupsCtrl.createMeetup);

router.post('/:id/join', AuthCtrl.onlyAuthUser, MeetupsCtrl.joinMeetup);
router.post('/:id/leave', AuthCtrl.onlyAuthUser, MeetupsCtrl.leaveMeetup);

router.patch('/:id', AuthCtrl.onlyAuthUser, MeetupsCtrl.updateMeetup)

module.exports = router;

And the function that is called on the server:

exports.getMeetups = function(req, res) {
  const {category, location} = req.query;
  
  const findQuery = location ? Meetup.find({ processedLocation: { $regex: '.*' + location + '.*' } })
                             : Meetup.find({})
  findQuery
        .populate('category')
        .populate('joinedPeople')
        .limit(6)
        .sort({'createdAt': -1})
        .exec((errors, meetups) => {
    if (errors) {
      return res.status(422).send({errors});
    }

    if (category) {
      meetups = meetups.filter(meetup => {
        return meetup.category.name === category
      })
    }

    return res.json(meetups);
  });
}

The problem is that when I send the first 2 requests - everything is OK, and when the 3rd one - it gives a 404 status and when debugging it does not even enter this function, it does not cling to breaks. What could be the snag?