I am trying to import a csv file from my payroll software into Ledger and get the error "Invalid Date '05/31/2006' in field called 'Fiscal Date" in record 1". I do not get an error on the transaction date however. It is set to ascii YYYYMMDD format.

I tried to change the date format on my system to mm/dd/yyyy but that did not fix it.

I had no issue with this previously but recently I installed a Ledger patch.