Hi Robert — I suspect it might be this.
const ROOT_URL = ‘http://localhost:3001/api/auth';
this address will only work locally, but once in production, Heroku will typically assign a port randomly.
Try redefining the endpoint like this. In development, this will work due to the “proxy” entry in the client/package.json we defined. And in production, it’ll work because it’s just a local resource.
const ROOT_URL = ‘api/auth’;