Subject must be at least {min} characters
Support validation returned support.subjectMin when the subject is shorter than {min}. Max sibling: Subject must be at most {max} characters.
Why this happens
Minimum length on ticket/contact subject fields. Message/content have their own min rules.
Diagnose and fix
1. Expand the subject to at least {min} characters.
2. Avoid whitespace-only subjects.
3. Retry create/submit.
4. See Tickets (member) / Contact form (member).