Subject must be at most {max} characters
Support validation returned support.subjectMax when the subject exceeds {max}.
Why this happens
Maximum length on subject fields. Put extra detail in the message/content body instead.
Diagnose and fix
1. Trim the subject to {max} characters or fewer.
2. Move longer text into the message field.
3. Retry submit.
4. See Message must be at most {max} characters for body limits.