Thx clemente.raposo
I just did a simple fix and it works :
core/backend/Install/LegacyHandler/InstallHandler.php
line 265
from:
“mysql:host=” . $inputArray[“db_host”] . “:” . $inputArray[“db_port”] . “;”,
to:
“mysql:host=” . $inputArray[“db_host”] . (empty($inputArray[“db_port”]) ? “” : “:” . $inputArray[“db_port”]) . “;”,