MediaWiki PageForms: Combobox not showing as option in Special:CreateProperty

I set up Mediawiki with

Page Forms  5.2.1
Semantic MediaWiki  2.5.8

However, when I try to create a combobox property at Special:CreateProperty I cannot find Combobox in the drop down menu. Am I missing something?

Combobox is not a property type (data type), it's an input type of a form field. The correct workflow is the following :

• Create properties with a specific data type
• Create a template which defines fields and associate them with properties
• Create a form from the template which defines how fields are set (input type), such as combobox.