This app runs on family-operating-system-dun.vercel.app, but it is using production Clerk keys (pk_live_). Clerk does not allow changing the domain for *.vercel.app production — there is no setting in Vercel either.

Clerk's documented fix: use Development keys on *.vercel.app URLs. They work on any Vercel address.

Fix (about 3 minutes):

1. Open Clerk Dashboard. At the top left, switch from Production to Development.
2. Go to Configure → API Keys. Copy the pk_test_ and sk_test_ keys (from clerk-cerise-xylophone).
3. Open Vercel → Environment Variables. Set NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY to the pk_test_ value and CLERK_SECRET_KEY to the sk_test_ value for Production.
4. Delete any old pk_live_ values, then redeploy.