When I run both the app and the server locally, there is no issue. However, once I deploy the express server, every time I make a request, I get back the following error.

"has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource."

My server is using cors, and I also tried doing app.options(*, cors()) but that won't work either. I have tried just about every solution online that I could find.

This is what I have in the index.js of the express server.

app.options("*", cors());

app.use(bodyParser.json({ limit: "30mb", extended: true }));

app.use(cors());

app.get("/", (req, res) => {
  res.send("Food Tracker Server");
});```