Fixed php session save permission problem

CMS/Backend/conf.sh

@@ -3,6 +3,8 @@ curl --retry 7 --retry-delay 5 -s "$repo"/raw/"$branchtype"/"$branch"/CMS/Backen
 sed -i 's/PHPver/'$phpver'/' "$phpPoolDir"/Backend.conf
 groupadd Backend
 useradd -g Backend Backend
+usermod -a -G www-data Backend
+
 #PHPMyAdmin configuration
 touch /var/log/PhpMyAdmin/PhpMyAdmin_auth.log
 chown Backend:Backend -R /usr/share/phpmyadmin