Message must be at most {max} characters
Support validation returned support.messageMax when the message exceeds {max}. Content field uses Content must be at most {max} characters.
Why this happens
Maximum length on message/body fields.
Diagnose and fix
1. Trim to {max} characters or fewer.
2. Continue in a follow-up reply if the ticket allows.
3. Retry submit/send.
4. See Attachment must be {max} or smaller if the issue is file size, not text.