Unable to view previously uploaded projects

I taught a digital editing course in spring 2016 and students in the course uploaded small edition. At that time, the editions displayed well and many had page images incorporated effectively. I uploaded a project myself that also displayed correctly at the time. I've just logged in to begin uploading more projects and find that I can't see any of these projects (when viewing in "reader" or "metadata," I get the "resource not found" error message. The xml, -ography, and image files are there, but they do not display. Is it possible my TEI membership has lapsed and this has interfered? Are there other issues that are making these files not display? Thanks! -Mary