Dimension &1 and product class &2 not created => no overviews

What causes this issue?

The group dimension NAV_OVIEW and the corresponding product model class
SALES PRODUCT have not been created. The system needs these values to
display the overviews in the navigation tree.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If you want to display the overviews, enter the values required in
Customizing.
To do this, make the relevant settings in Customizing for Policy
Management under -> In-Force Business Management -> Basis -> Basic
Settings -> <DS:SIMG./PM0/ABU_CPRELGR>Define Product Module Groups</>.
Under <ZK>Group Dimensions.</>, enter the NAV_OVIEW group dimension.
Then select this entry and navigate to <ZK>Assign Product Model Class to
Group Dimension</>. Here, you enter the product model class SALES
PRODUCT.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.