I have an app created with OneDrive for Business that I use with my students. I've shared the folder with the excel file with them. When some of my students open the app, they receieve the error: "Failed to load TableStudentName. An unknown error occurred." The really annoying thing is that it doesn't happen for all of them. I've checked that the individual students have read permission (they're not writing to the spreadsheet at all) and that the folder has been shared with them.