"For a new onlineshop I only need the ecommmerce-module" so thought...
and had to make a few adjustments:
I had to get
(it is all downloadable in the extensions-section)
and changed in ecommerceextras\code\reports\salesreport.php and in ecommerceextras\code\reports\paymentreport.php
in both lines 6 from "SSReport" to "SS_Report"
and now it works... after two days work :-)
... in english... guess I have todo a bit on the lang-file (de_DE) myself.
Anyway, hope this helps (for todays versions)