**URGENT: Persistent 404: NOT_FOUND on custom domain onyx-drift.com despite Successful Build and Manual Promotion.** Hello Support Team, I am experiencing a critical infrastructure issue. My domain onyx-drift.com is stuck on a 404 error, even though Vercel's internal checks confirmed: 1. **Build is Successful** (Output: client/dist/index.html is confirmed). 2. **Deployment is READY** and manually promoted to production. 3. **The issue is on the platform side** (routing/deployment mapping). I cannot submit a ticket due to my Hobby plan. Please help resolve this Edge Network issue immediately.