Project ID : b1d6fa08-43ff-4114-82f0-f836e0ee2651

Hi, I'm getting this error when trying to call from my frontend to Flask backend server hosted on Railway:
Access to fetch at '[[http://c...pp](http://c...pp)/1980]([http://c...pp](http://c...pp)/1980)' from origin '[[http://localhost](http://localhost):3000]([http://localhost](http://localhost):3000)' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.

Here is my flask server looks like:

` ------------------ SETUP ------------------
load_dotenv()
app = Flask(name)

this will need to be reconfigured before taking the app to production

cors = CORS(app, resources={r"/*": {"origins": "[http://localhost](http://localhost)", "[[http://localhost](http://localhost):3000", "http://c…pp"]}})
…

------------------ START SERVER ------------------

if name == 'main':
app.run(debug=True, port=os.getenv("PORT", default=5000))
`

Do you have any suggestion?
Anyway, thank you for building amazing railway!