GOautodial Open Source Omni-channel Contact Center Suite

Hi, I use the Version 4 How To Install Goautodial From Scratch (using CentOS 7) to install Goautodial 4 on vps and I even update the installation using : https://goautodial.org/projects/goautodialce/wiki/HOWTO_Update_latest_version_via_Github.
After the installation, when I logged in, it works fine but when I tried to access any link, I'm directly logout to the login page. When I check the log with tail /var/log/php-fpm/www-error.log,
there is the result :

PHP Fatal error: Uncaught Exception: Unable to create current user. Session not set. in /var/www/html/php/CreamyUser.php:36
Stack trace:
#0 /var/www/html/php/CreamyUser.php(53): creamy\CreamyUser->__construct()
#1 /var/www/html/adminsettings.php(34): creamy\CreamyUser::currentUser()
#2 {main}
thrown in /var/www/html/php/CreamyUser.php on line 36.

thanks for you help!