This error in Aurena dashboard is commonly seen for customers who have applied APP10 UPD7 and it is becaused of a bug in the UPD7 DEMAND component.
This has been fixed in UPD 8 but customers can use below workaround untill UPD8 is get delivered.
Small configuration change(Demand Server-> File->Setup-> General->select Forecast & IPR; Then restart the demand plan server).
