Could not send reply
Ticket reply UI shows tickets.view.reply.sendFailed when sending a message fails without a more specific string.
Why this happens
Network/server error, closed ticket, rate limit (wait N seconds), captcha, or validation. Distinct from Close failed (bulk close).
Diagnose and fix
1. Confirm the ticket is still open; refresh the thread.
2. Meet message length rules; complete captcha if shown.
3. Wait if rate-limited, then retry.
4. See Ticket not found if the ticket was removed.