Fatal error: Uncaught ArgumentCountError: Too few arguments to function error_handler(), 1 passed and exactly 4 expected in /customers/6/7/5/petlas.nl/httpd.www/system/startup.php:15
Stack trace:
#0 [internal function]: error_handler(Object(Error))
#1 {main}
  thrown in /customers/6/7/5/petlas.nl/httpd.www/system/startup.php on line 15