Have gone through this several times.
Have changed current date in the Time list to 20209Have tried with date set at 2019 as well), in mapping have source as Column Headers -> Time, Fixed Item Location->G3 location, Fixed item P2 Products->P2 products, Fixed line item.
Row and Column are adjusted to 2 and 3.
Time is listed as Periods yyyymm, Location all regions, Products all products, Volume/Inputs as Volumes.
In Module I have Time Scale= Month and Time Range= Model Calendar
Still I get error message as "expected 4 digits in year".