I have an upcoming course and have sent up a link for students to enroll. However, when they do so, their names are not displayed under People or above their posts in discussions. Instead, the Name field is literally empty, except for one student, whose "name" is a long number:

Some of the students' names are, however, visible when I click on their profile. I've contacted Canvas support but am yet to hear back. Has anyone encountered anything like this? Any ideas would be greatly appreciated.