Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /home/httpd/vhosts/burgbachkeller.ch/httpdocs/system/helpers/user_helper.php:101
Stack trace:
#0 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/system/helpers/user_helper.php(101): in_array(NULL, NULL)
#1 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/system/helpers/user_helper.php(88): is_allowed_fe(NULL)
#2 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/customer/layout/head.php(3): check_login(NULL, 788, NULL, NULL)
#3 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/customer/layout/header.php(1): include('/home/httpd/vho...')
#4 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/frontend/controller/fe_controller.php(224): require_once('/home/httpd/vho...')
#5 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/customer/extentions/spielplan/controller/fe_controller.php(24): FE_Controller->loadView('alle_artikel_vi...', NULL)
#6 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/system/core/controller.php(191): FE_Spielplan->index()
#7 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/frontend/controller/fe_controller.php(202): Controller->loadController('spielplan', false, true)
#8 /home/httpd/vhosts/burgbachkeller.ch/httpdocs/index.php(77): FE_Controller->getController('programm')
#9 {main}
  thrown in /home/httpd/vhosts/burgbachkeller.ch/httpdocs/system/helpers/user_helper.php on line 101