DataSync for ServiceNow requires the Perspectium script includes to function properly. The Script Includes module will contain these required scripts. 

To access this module, you need the Admin role. See ServiceNow Roles on how to assign roles. 

No valid Data Center license found

Please go to Atlassian Marketplace to purchase or evaluate Refined Toolkit for Confluence Data Center.
Please read this document to get more information about the newly released Data Center version.