I am a teacher using Canvas for the first time. My students have had no issues with submitting Google assignments through Canvas until today. Multiple students have had trouble submitting their Google assignment through Canvas. They say that they need to request access or that their session has expired. I have tried to change the privacy settings on this document in my own Drive, but it does no good. The only solution is for them to share the document with me, but that makes grading using the SpeedGrader inaccessible. Is there some tips I can offer my students so this will not happen in the future?