In the portfolio workbench, the values shown in this view are not reflecting the accurate data from projects.
For example, in the 'Cost (planned vs actual)' chart, the planned cost might display as zero throughout FY19: M12 to FY20: M12 however, in projects under this portfolio there might be over 3M of planned cost in this period.
There might be some projects using incorrect fiscal periods.
If there are fiscal periods with the incorrect format (i.e. not in the 'FY16:M01-Jan' format) they need to be removed. Any cost and benefit plans using such fiscal period should be updated to use the correct ones.