Sometimes you may face following error in phpmyadmin
Cannot start session without errors, please check errors given in your PHP and/or webserver log file and configure your PHP installation properly.
First thing you’ll neet to do is to check the error logs.(Generally its here /usr/local/apache/logs/error_log). You will probably see errors referencing permission errors writing to your session directory.
Just change the permission of the session directory (chmod 777) you should be good to go.
If no success….
Login in to the Shell with the root user and then open the file using your favorite editor.
# vi /usr/local/cpanel/3rdparty/etc/phpmyadmin/php.ini
Search for session.save_path and change the following
session.save_handler = sqlite
session.save_path = /var/cpanel/userhomes/cpanelphpmyadmin/sessions/
session.save_handler = files
session.save_path = /tmp
Save & Exit
If after upgrade its reverting back, or you don’t want to change the session.save_path in php.ini for phpmyadmin
# mkdir -p /var/cpanel/userhomes/cpanelphpmyadmin/sessions
# chmod 1777 /var/cpanel/userhomes/cpanelphpmyadmin/sessions
and restart the apache service.
You are done !