CiviCase Create and CiviCase Update actions provides Case Subject as an input field, but should be provided as a parameter option field so that the Case Subject can be set by an Input Field in the Form Processor.
This is required when the Case Subject needs to be set dynamically based on form input.
Changed the "Subject" configuration to "Default Subject" and left as a required field in the Configuration to ensure that the Case can still be created if no option has been selected for the Subject parameter.
Agileware Ref: CIVICRM-2016
CiviCase Create - with change applied
CiviCase Update - with change applied