( ! ) Fatal error: Uncaught Hurah\Types\Exception\NullPointerException: No Course page could be found with tag a4-guy.mp4. in /var/www/dynamic/courses.devroc.nl/src/CoursePage.php on line 75
( ! ) Hurah\Types\Exception\NullPointerException: No Course page could be found with tag a4-guy.mp4. in /var/www/dynamic/courses.devroc.nl/src/CoursePage.php on line 75
Call Stack
#	Time	Memory	Function	Location
1	0.0001	355744	{main}( )	.../index.php:0
2	0.0036	428288	Canvas\CModule\CoursePage\CoursePageController->run( )	.../index.php:34
3	0.0039	429008	Canvas\FrontendFramework\AbstractCourse->getPageByTag( $sPageTag = 'a4-guy.mp4', $sPageDir = NULL )	.../CoursePageController.php:39
4	0.0039	429008	Canvas\FrontendFramework\CoursePage::fromTag( $tag = 'a4-guy.mp4', $course = class Canvas\Course\PythonComputerVision { protected array $aTechnologies = [0 => 'python', 1 => 'pip', 2 => 'json', 3 => 'terminal', 4 => 'dependency management']; private string ${Canvas\FrontendFramework\AbstractCourse}courseDirName = 'python-computer-vision' }, $sPageDir = NULL )	.../AbstractCourse.php:302