DSS requires a license to work.
If you use the Community Edition, the license is automatically generated when you fill the form at the first start of the studio.
If you use the Enteprise Edition, Dataiku will provide you with a license file.
There are three ways to use this file:
inside the interface, by clicking the "Administration" gear
When installing DSS, use the -l flag:
dataiku-dss-VERSION/installer.sh -d DATA_DIR -p PORT -l /path/to/license.json
by copying your license file into DATA_DIR/config/license.json