Ayer, después de cambiar de host local a alojamiento Heroku, recibí este error: UnhandledPromiseRejectionWarning: MongooseError: Operation user_caches.findOne() buffering out after 10000ms

Mi archivo Web.js:

 app.get('/api/user/:id', async (req, res) => { const user = await users.findOne({ discordId: req.params.id }) ?? await users.findOne({ accounts: { $elemMatch: { id: Number(req.params.id) }}}); const blacklist = await blacklists.findOne({ discordId: req.params.id }) ?? await blacklists.findOne({ accounts: { $elemMatch: { id: Number(req.params.id) }}}); if (blacklist) return res.send(`No acquirable data, this user is blacklisted.`); if (!user) return res.send(`${req.params.id} is not located in the database.`); return res.send({ 'discordId': user.discordId, 'accounts': user.accounts }); });

Mi esquema:

 const { Schema, model } = require('mongoose'); const user = Schema({ discordId: String, accounts: Array, maxWhitelists: { type: Number, default: 1 } }); module.exports = model('user_cache', user);

¡Cualquier ayuda sería apreciada!