I have assigned my students a Google Cloud Slides assignment that created a copy for each student in their Google account.  Students have submitted their work.  So, now I am checking using the speed grader and am not having issues with most students' work.  However, a select few students' submissions are showing up as a blank white screen as I've snipped below.  What is causing this.  My technology person had me clear my data, shut down Chrome and log back into Canvas, but that didn't fix anything. Any ideas of what is going wrong??