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Fatal error: Uncaught TypeError: array_flip(): Argument #1 ($array) must be of type array, null given in /var/home/christian/projects/neue-offenbarung/app/controllers/BibleController.php:329 Stack trace: #0 /var/home/christian/projects/neue-offenbarung/app/controllers/BibleController.php(329): array_flip() #1 /var/home/christian/projects/neue-offenbarung/app/controllers/BibleController.php(163): BibleController->getBookNumberByName() #2 /var/home/christian/projects/neue-offenbarung/app/controllers/BibleController.php(52): BibleController->showChapter() #3 /var/home/christian/projects/neue-offenbarung/app/lib/Core/Mvc/Router.php(242): BibleController->handleAction() #4 /var/home/christian/projects/neue-offenbarung/public/index.php(59): Core\Mvc\Router->handle() #5 {main} thrown in /var/home/christian/projects/neue-offenbarung/app/controllers/BibleController.php on line 329