Fatal error: Uncaught Error: Call to a member function query() on null in /var/www/vhosts/cartoonists.gr/httpdocs/include/database.php:722
Stack trace:
#0 /var/www/vhosts/cartoonists.gr/httpdocs/include/database.php(60): MySQLDB->calcNumActiveUsers()
#1 /var/www/vhosts/cartoonists.gr/httpdocs/include/database.php(1366): MySQLDB->MySQLDB()
#2 /var/www/vhosts/cartoonists.gr/httpdocs/include/session.php(12): include_once('/var/www/vhosts...')
#3 /var/www/vhosts/cartoonists.gr/httpdocs/theme/header.inc.php(3): include_once('/var/www/vhosts...')
#4 /var/www/vhosts/cartoonists.gr/httpdocs/view_cat.php(5): include('/var/www/vhosts...')
#5 {main}
thrown in /var/www/vhosts/cartoonists.gr/httpdocs/include/database.php on line 722