Import Employees App in SAP Marketing Cloud - System settings does not allow this app to be used.

Hello SAP,

If i click on Import Employees App in Marketing cloud, i am getting an error "System settings does not allow this app to be used."

Can anyone explains what is wrong here?

Secondly: What is the best way to import employee from S4 to Marketing.? Is there any standard way to import Employee to Marketing?

Br Mayank