rf1159 is no longer required by Skatteetaten so this report is no longer available for download.
The new filing system only requires you to fill in the details online and then attach a report that shows a breakdown of these calculations. The Complete Tax Report generated by Koinly is a great report to attach as it includes detailed summaries and calculations.
Workaround
You can fill the totals based on the "Complete Report" and then attach it as the detailed source of all transactions, no other file is needed.