Fatal error: Uncaught TypeError: Exam21API::getViewData(): Return value must be of type array, none returned in /var/www/html/Klausuren/21SS/Aufgabe/Exam21API.php:20 Stack trace: #0 /var/www/html/Klausuren/21SS/Aufgabe/Exam21API.php(25): Exam21API->getViewData() #1 /var/www/html/Klausuren/21SS/Aufgabe/Exam21API.php(40): Exam21API->generateView() #2 /var/www/html/Klausuren/21SS/Aufgabe/Exam21API.php(48): Exam21API::main() #3 {main} thrown in /var/www/html/Klausuren/21SS/Aufgabe/Exam21API.php on line 20