Newer versions of QuickBooks now offer two ways to import: These are the new default method and the older method, that you may have used with older QuickBooks versions – which continues to work appropriately. The new Bad method will most definitely error out.
Good: The misleading Import Without Review, Import it for me link, which uses the stable code we’ve all been using with IIF files for 20+ years. IIF files work best using this option. This will continue to import with the existing setup you were using prior to upgrading.
As always, please contact Support with any questions.