When I put a placeholder [LISTS] in my own messages (in Template, Content or Footer) it does not work : Nothing or the name of the placeholder ([LISTS]) is printed but not the value.
In system messages (Confirmation Messages, Confirmation Preferences) it is ok.
At the topic https://resources.phplist.com/placeholders, in the list of placeholders, there is question marks (-- (???) in front of [LISTS]. What does it mean ?
Thank for your responses