Most likely fixes:
1. Turn off Brave Shields / uBlock / AdBlock / DuckDuckGo for this site — they block supabase.co.
2. Try opening the page on your phone over mobile data. If it works there, your home/office Wi‑Fi, VPN, or antivirus is blocking the domain.
3. Verify the project isn't paused: Supabase Dashboard → Project Settings → General.
4. Ask your admin to add this HR URL to Supabase → Authentication → URL Configuration → Redirect URLs.