Cannot sign in to claim Next.js learn course certificate : getting 404 on auth/error

Current vs Expected behavior:
I completed all 16 chapters of the Next.js dashboard course. When I click “Sign in to save progress” on any chapter page I am redirected to nextjs.org/auth/error with a 404 page. Expected behavior is to be taken to a sign in page and then have my progress saved so I can claim my completion certificate.

Code, configuration, and steps to reproduce:
Go to App Router: Next Steps | Next.js
Click “Sign in to save progress”
Redirected to nextjs.org/auth/error — 404 page
Tried with Chrome and Safari browsers
Tried signing in with both GitHub and email
All methods result in the same 404

There’s another community post with 404 debugging tips that might be helpful. Please give these solutions a try and let us know how it goes.

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