Sometimes if you login in to PHPMYADMIN, you can see the error as follows.

Cannot start session without errors, please check errors given in your PHP and/or webserver log
file and configure your PHP installation properly.

Solution :-

1) Check permissions of /tmp. It should be 755. Change it to 1777.

2) Open file /usr/local/cpanel/3rdparty/etc/phpmyadmin/php.ini

Change session.save_path as /tmp and restart apache.