Working on a project with my students and cannot use the "project manager"

Hey all, I am working on a project with my students. We would like to work at our separate locations. We can all get the premiere project file itself. But we cannot access the clips that are all over one students' computer. I've researched to use the "Project Manager" but it is grayed out. So I cannot export or do any of the other tricks I've seen while researching. Please help. Thank you.