Resend verification email is disabled or missing
Sending auth.verify_email_resend returned not-sent. Product: enable it under Admin → Settings → Emails.
Why this happens
The resend-verification template is disabled or missing — same pattern as Password reset email is disabled or missing. Distinct from SMTP/Gmail transport failures and from banned-user blocks.
Diagnose and fix
1. Admin → Settings → Emails — enable the resend / verify-email resend Auth template; save.
2. Confirm outbound mail (SMTP settings / Gmail XOAUTH2).
3. See Auth email templates / How to edit an email template.
4. Retry resend; if send succeeds but nothing arrives, use the delivery checklist.