I tried to upgrade my panel from 10.3.0 to 10.4.4 and the process failed. In installation log i've this: Trying to install PAM module... PAM configuration loaded from (directory="/etc/ pam.d", file="/etc/pam.conf"). Configuration contains 54 file(s) calculated 3 position(s) to change 'auth' stacks required 'auth' stack(s) modified (in memory) 4:some functionality isn't yet implemented WARNING! Some problems are found during install PAM module not successed(see log file: /t mp/plesk_10.4.4_installation.log) I tried again with bootstrapper, nothing good, same error. How can i go on?