This run-time message occurs if a mini-calendar token contains both a :dte mini-calendar modifier and a :ws week start mini-calendar modifier.
The combination of these 2 modifiers, within the same mini-calendar token makes no sense, as both the :dte and the :ws try to change the baseline date of tokens that are inside a mini-calendar, both in a different and contradictory manner.
Topic 177430, last updated on 17-Apr-2020