Sometimes when you try access PhpMyAdmin you will get session errors that it says

Error during session start;

Solution 1:

To fix this error is very simple, all you have to do is to login into your server with terminal and run this command

chmod 777 /var/lib/php/session

Solution 2:

Second solution is to edit your php.ini file and make changes below:

session.save_path = "/var/lib/php/session"

That's all you need to do and your problem is solved.