Hi there
Just to be absolutely sure:
In Esri's documentation ArcGIS API for JavaScript, for the Class "Print" , it's said:
Note: The Print widget requires an ArcGIS Server 10.1 Export Web Map Task.
(See Print | API Reference | ArcGIS API for JavaScript)
I guess that newer (or maybe less ancient) versions of ArcGIS for Server (like version 10.3) are supported as well, aren't they?
Regards, Tobias