CORS error when running Polar locally for contributing

[Manas-Kenge]

Hi,

I’m running Polar locally for contributing and I’m hitting CORS errors when trying to create products or discounts from the frontend.

What I see

When creating a product (src/hooks/queries/products.ts):

Access to fetch at 'http://127.0.0.1:8000/v1/products/' 
from origin 'http://127.0.0.1:3000' has been blocked by CORS policy: 
No 'Access-Control-Allow-Origin' header is present on the requested resource.

POST http://127.0.0.1:8000/v1/products/ net::ERR_FAILED 500 (Internal Server Error)
Uncaught (in promise) TypeError: Failed to fetch
    at Object.mutationFn (products.ts:105:18)
    ...

When creating a discount (src/hooks/queries/discounts.ts):

Access to fetch at 'http://127.0.0.1:8000/v1/discounts/' 
from origin 'http://127.0.0.1:3000' has been blocked by CORS policy: 
No 'Access-Control-Allow-Origin' header is present on the requested resource.

POST http://127.0.0.1:8000/v1/discounts/ net::ERR_FAILED 500 (Internal Server Error)
Uncaught (in promise) TypeError: Failed to fetch
    ...

Debugging done

• Tried sending the same request via Postman → still fails.
• Tried setting CORS_ORIGINS to "*" → still blocked by the browser.

Additional notes

• Already asked for help on Discord but didn’t get a response.
• This happens only on POST requests (/v1/products/, /v1/discounts/).
• Running frontend on 127.0.0.1:3000 and backend on 127.0.0.1:8000.

Could you clarify if this is a misconfiguration on my side, or if there’s an issue with how CORS is applied on POST endpoints locally?

Thanks!