This file contains HTML and cannot be previewed. Please download to view.
I'm getting a handful of student submissions that, in Speedgrader, show the following message: "This file contains HTML and cannot be previewed. Please download to view." However, when I try to download the file, I am unable to. I had a student share her screen with me to see if there was some kind of user error (uploading the wrong kind of file, or perhaps pasting the url of their Google doc instead of the file itself), but I didn't see anything out of the ordinary. While this is only affecting a small number of my students, I've had another teacher report that about 30% of her student submissions look this way.
I've looked for an answer, but all I've seen are a couple unanswered posts (including one where a moderator closed the thread because there wasn't much discussion on it).