Fatal error: Uncaught TypeError: sort(): Argument #1 ($array) must be of type array, null given in /home/markuseb/public_html/bastards/de/konzerte.php:50 Stack trace: #0 /home/markuseb/public_html/bastards/de/konzerte.php(50): sort(NULL) #1 {main} thrown in /home/markuseb/public_html/bastards/de/konzerte.php on line 50