As an admin, when accessing to see student submissions, if you want to remove a submission from one of them in the submission table, the user is redirected to a page to confirm the action. After confirming the following request is done:

POST mod/assign/view.php

id 251
action removesubmission
userid 4
sesskey VbtLiyDeff

This requests returns a 303 code and goes to the table where nothing had happened.

Note: As a teacher the option to remove submission is not being shown. (the error is only as an admin).

To reproduce this error:

• As an admin enter into an assignment that have some student submissions on it.
• Enter into "View all submissions".
• Click on "Edit" dropdown of an student WITH submission.
• Check remove submission is shown but it does nothing (after confirming the action the submission is still there).

We should try that the other items on the "Edit" dropdown also work.