[SOLVED] Cloned environment : permission denied

Hello,
Tying to create a cloned environment I get this message in log :Bac a Sable - Début de création de l'environnement
[V10.1.4] ERROR *****on file '/vagrant/html/projeqtor/model/DataCloning.php' at line (480)
cause = mkdir(): Permission denied
Erreur simulation - Impossible de créer un répertoire cible

Wich user is trying to create a new directory in this case ?
Thanks for your help

Thank you.
I read the code and saw that "simulation" directory should be 777.
This directory is owned by root ... so I changed this directory to 777 and it works ... now I've got a subdirectory owned by the "normal" php user inside simulation directory.