Started getting this error on an old dataflow as of 14-Jun-2021. No changes made. Error: Expression.Error: We cannot apply operator < to types Date and DateTime. Operator = < Left = 5/1/2020 12...
The only workaround for me was to branch the query into a separate dataflow, which ran without a hitch.
Wrapping the columns into DateTime.From() or re-applying Transform.ColumnTypes() did not work with the original linked entity, but referencing the same entity in another dataflow worked.