21762: Default Opt-Out/Help Length Invalid

The campaign submission could not be processed because the opt-out and help messages and keywords for the provided messaging service's opt-out configuration are not of a valid length. Please verify that the opt-out and help messages are between 20 and 320 characters each. Also verify each set of comma delimited opt-out and help keywords does not exceed 255 characters.

Message or keyword fields exceed length limits.

Limit messages to 320 characters and keywords to 255 combined characters.