Fatal error: Uncaught Error: Call to a member function getId() on null in /home/enect/src/Repository/LessonRepository.php:178 Stack trace: #0 /home/enect/html/member/lesson/detail.php(35): App\Repository\LessonRepository->bindLessonExercises(Array) #1 /home/enect/html/member/lesson/detail.php(15): setLesson() #2 {main} thrown in /home/enect/src/Repository/LessonRepository.php on line 178