I have 200+ students creating 3-D designs. They are in separate classes that I moderate. Some accounts I can see all of their work and some accounts, I can see a portion of their work, and some accounts I can't see any designs. Yet the students share their work with me (send me the share link) and many times I can see the designs sometimes other times I get 504 errors or 510 (link expired) errors and I have to hunt down the student.
Why can't I see students work when I am viewing their account? Why can I see some students work in their accounts but not others?