This message is due to the :Top12 minicalendar modifier being incompatible with the current bottom-aligned minicalendar option.

These settings are mutually exclusive (cannot be used at the same time), as the :Top12 modifier is a way of dealing with the case of months that cover 6 weeks, using always 5 rows, and the bottom-aligned option is used to display the minicalendar differently depending on whether the current month extends over 5 or 6 weeks.

Topic 177335, last updated on 19-Apr-2020