This email is already registered — sign in with your password
Social login found an existing active account for the provider email but could not auto-link (unverified provider email, or link race). Redirect: This email is already registered. Sign in with your password.
Why this happens
oauth_email_account_exists: member already registered with email/password. They must sign in with password first; linking may occur when the provider email is verified, depending on product rules.
Diagnose and fix
1. Sign in with email and password (use forgot-password if needed).
2. Then link the provider from Social login (member view) if available.
3. Do not create a second account with a different email unless intended.
4. Distinct from No account linked to this provider (no existing email match).