Nie wypalilo polaczenie z baza, ponieważ: SQLSTATE[HY000] [2000] mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file
Warning: Undefined variable $pdo in /home/kutno1/ftp/yoursuccess.edu.pl/settings/databases_connection.php on line 25

Fatal error: Uncaught Error: Call to a member function exec() on null in /home/kutno1/ftp/yoursuccess.edu.pl/settings/databases_connection.php:25 Stack trace: #0 /home/kutno1/ftp/yoursuccess.edu.pl/index.php(28): include() #1 {main} thrown in /home/kutno1/ftp/yoursuccess.edu.pl/settings/databases_connection.php on line 25