1
the answer is here :
https://xoops.org/modules/newbb/viewtopic.php?topic_id=54121&forum=28&post_id=239146
replacing the mentionned variables solved my problem
https://xoops.org/modules/newbb/viewtopic.php?topic_id=54121&forum=28&post_id=239146
replacing the mentionned variables solved my problem