My students have completed a quiz, which all went fine. However, when I have a look at the quiz report, some of the names and pictures do not appear. i have tried to login as admin and teacher and neither works. Most names and pictures show, only some do not The rest of the data in the report is correct but I don't know which student it belongs to...
Just for the record, if I try and download the quiz report in a different format (Excel, ODS...) it works fine and all names appear.
Does anybody have any idea why this would happen? And how to fix it?