This message occurs if there are additional characters between the :Top12 minicalendar modifier and the next colon or closing brace.
For example: using [1mc+00:Top12Week], instead of [1mc+00:Top12-Week], to display "Week" on the top row, where the w# is, when months have 5 weeks or less, where a hyphen "-" separates the "Top12" from the text to be displayed.
Topic 177350, last updated on 17-Apr-2020