Fatal error: Uncaught TypeError: Argument 1 passed to Functions::dateFormat() must be of the type string, null given, called in /var/www/vhosts/vanderlindenautos.nl/httpdocs/frontend/pages/publications/specific.php on line 28 and defined in /var/www/vhosts/vanderlindenautos.nl/httpdocs/classes/class.functions.php:114 Stack trace: #0 /var/www/vhosts/vanderlindenautos.nl/httpdocs/frontend/pages/publications/specific.php(28): Functions::dateFormat() #1 /var/www/vhosts/vanderlindenautos.nl/httpdocs/frontend/layouts/default.php(69): include('/var/www/vhosts...') #2 /var/www/vhosts/vanderlindenautos.nl/httpdocs/frontend/index.php(21): require_once('/var/www/vhosts...') #3 /var/www/vhosts/vanderlindenautos.nl/httpdocs/index.php(2): require_once('/var/www/vhosts...') #4 {main} thrown in /var/www/vhosts/vanderlindenautos.nl/httpdocs/classes/class.functions.php on line 114