无法获得phpMyAdmin页面

I have installed xampp on my linux-mint as in http://www.linuxandubuntu.com/home/how-to-download-install-xampp-on-linux

and although the dashboard page working normally the PHPMyAdmin cant be open :/

when I getting this page I get :

Error during session start; please check your PHP and/or webserver log file and configure your PHP installation properly. Also, ensure that cookies are enabled in your browser.

session_start(): open(SESSION_FILE, O_RDWR) failed: Permission denied (13)

session_start(): Failed to read session data: files (path: /opt/lampp/temp/)

also, the GUI opend with

sudo ./manager-linux-x64.run

cant activate the MySQL server (when I click "start" the red light turns yellow and about two min later back to red...) so basically its the same issue (i guess ?).

the interesting thing that if I send the command

sudo /opt/lampp/lampp startmysql

I get

XAMPP: Starting MySQL...ok.

/o/lampp ❯❯❯ /opt/lampp/bin/mysql.server: 264: kill: No such process

I am starting to learn PHP and add it to my arsenal, hope that someone will help me to config the workspace :)

edit:

so after reinstall xampp,and changing $cfg['Servers'][$i]['auth_type'] = 'cookie'; in config.inc.php,

phpmyadnin works (only) on incognito mode.