Printing uses the modern ArcGIS pattern and ArcGIS Identities to author and access content and applications. Printing uses an Esri portal to store your print layout items. You must have either ArcGIS Online or ArcGIS Enterprise Portal 10.8.1+.
For on-premises installations of Studio Printing, the Printing Engine is deployed within your ArcGIS Enterprise environment, so an ArcGIS Enterprise license is required. The Cloud version does not require an ArcGIS Enterprise license. See On-Premises Printing vs Cloud Printing for more information.