cors

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Flat vector illustration of a person holding a laptop on a cliff edge, facing a large blank red stop sign that stands between two separated platforms, on an indigo-violet background

'Blocked by CORS policy' in Lovable, Bolt or Cursor? Fix it on the server

That red console error means your browser stopped your own app from reading a reply. What CORS actually is, why the quick "allow everything" fixes backfire, and the right fix for Supabase functions and Next.js.

Aliteq Team · 3h ago · 9 min