API REST node & Express.js deploy in Render - node.js

Question

I am deploying the server part of a project, built in node and express and it says that the server is live but it doesn't work. In console I get the errors:
" Failed to load resource: the server responded with a status of 404 ()",
" Refused to load the stylesheet 'https://fonts.googleapis.com/css?family=Lato:300,400,700,900' because it violates the following Content Security Policy directive: "default-src 'none'". Note that "style-src-elem" was not explicitly set, so 'default-src' is used as a fallback.".
I don't understand why it gives me that error, since there is no css or html file...
here is my entry js file:
const express = require('express')
const app = express()
const mongoose = require('mongoose')
const xss = require('xss-clean')
const mongoSanitize = require('express-mongo-sanitize')
const { handleError, convertToApiError } = require('./middleware/apiError')
const routes = require('./routes')
const passport = require('passport')
const { jwtStrategy } = require('./middleware/passport')
require('dotenv').config()
const mongoUri = `mongodb+srv://${process.env.DB_USER}:${process.env.DB_PASS}#${process.env.DB_HOST}? retryWrites=true&w=majority`
mongoose
.set("strictQuery", false)
.connect(mongoUri, {
useNewUrlParser: true,
useUnifiedTopology: true
})
.then((x) => {
console.log(
`Connected to Mongo! Database name: "${x.connections[0].name}"`
)
})
.catch((err) => {
console.error("Error connecting to Mongo: ", err)
})
//// body parse
app.use(express.json())
//// sanitize
app.use(xss())
app.use(mongoSanitize())
//// passport
app.use(passport.initialize())
passport.use('jwt', jwtStrategy)
//// routes
app.use('/api', routes)
//// handle errors
app.use(convertToApiError)
app.use((err, req, res, next) => {
handleError(err, res)
})
const port = process.env.PORT || 5005
app.listen(port, () => {
console.log(`Server is running on port ${port}`)
})
I don't even know what I could do...