blocked request with 403 Forbidden

Question

Hello. I get the following response when I try to access my app:
```Blocked request. This host ("railway-backend-production.up.railway.app") is not allowed.
To allow this host, add "railway-backend-production.up.railway.app" to `server.allowedHosts` in vite.config.js.```
Where does this vite.config.js live and how to I access/edit this file?

root101 · Accepted Answer

That looks like a cors config is missing.

You need to have something like this:

```
// vite.config.js
export default defineConfig({
  //more configs
  server: {
    allowedHosts: [
      'railway-backend-production.up.railway.app'
    ]
  }
});
```