如何解决渲染视图错误nodejs mongoose pug

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => console.log('Connected to MongoDB'))
  .catch(err => console.error('Failed to connect to MongoDB', err));

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const userSchema = new Schema({
  name: String,
  age: Number
});

const User = mongoose.model('User', userSchema);

const express = require('express');
const router = express.Router();
const User = require('../models/user');

router.get('/', (req, res) => {
  User.find()
    .then(users => {
      res.render('index', { users }); // 渲染名为index的Pug模板，并传递查询结果users
    })
    .catch(err => {
      console.error('Failed to fetch users', err);
      res.status(500).send('Internal Server Error');
    });
});

module.exports = router;

ul
  each user in users
    li= user.name