Running Moodle 2.61. and PHP 5.4.45 I teach a high school computing class in China
At the start of the semester, on the very first assignment, all students were able to successfully upload an excel file using the "edit submission". That is, except for one student. For that student, they click on "edit submission" and go to the next page. The page itself loads fine but the box for submitting a file by way of drag-and-drop / file picker just is an empty box with the loading icon in it constantly spinning. Five minute wait still has the box loading. The student changed to use a different computer in the lab but the problem remained. (Other students using that desk in the lab do not have the same problem and when I log in as the student the problem happens for me also)
Not having the time in a busy teachers calendar to track down the issue, I simply deleted the students account and signed them up for the class again. It was the first assignment of the semester after all. The new account works fine.
I am now two thirds of the way through the semester and the same bug is now happening for a different student. Same as before, this new student can get to the upload page but is constantly stuck at "loading" for the box to appear in the page.
QUESTION ONE) Is there a way to fix this other than what I did last time of just deleting the account and making a new one?
QUESTION TWO) Any guess as to what makes this happen? Is there a way I can avoid having this happen to any more students in the future?
Thanks in advance .....