After creating a cluster for a lesson and accessed the lesson again I've received an error:
 
Debug info: 
Error code: cannotfindpages
Stack trace: * line 482 of /lib/setuplib.php: moodle_exception thrown

• line 4946 of /mod/lesson/locallib.php: call to print_error()
• line 2232 of /mod/lesson/locallib.php: call to lesson_page_type_manager->load_page()
• line 3176 of /mod/lesson/locallib.php: call to lesson->load_page()
• line 217 of /mod/lesson/view.php: call to lesson->prepare_page_and_contents()

Steps to reproduce:

1. Login as an Admin
2. Create a Lesson activity
3. Add cluster to the lesson (Only a cluster, no other questions)
4. Login as a Student (enrolled in the course)
5. Access the Lesson

The error is displayed.