I am having the same issue, and I tried the suggestion of deleting empty rows. But nothing is working. Any other suggestions?
I clicked on Import students, then I got the screen with the "Download template" and "Browse for file" buttons. I downloaded the template and filled it with my student data (except for email, don't have). When I attempt to import by choosing the newly edited and saved template, the name of the file appears below "Browse" but nothing else happens.