When we try to access phpMyAdmin in WHM and if we are getting the following error:

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

Do the following:
1. open php.ini file in the location /usr/local/cpanel/3rdparty/etc/phpmyadmin/

2. Search for "session.save_handler" and "session.save_path"

3. Change session.save_handler = files and
session.save_path = /tmp

4. Now it should work.