Attached is two screenshots.
Our Moodle version is 3.6.1, Theme: Essential 3.6,
Students reported that he uploaded a file to be submitted as a assignment. However, when he clicked "Save changes" after he was attempting to delete the uploaded file. It prompts "Nothing was submitted." The File submission area is not allowed to be empty. It is obviously unreasonable.
We tested that for older version Moodle 2.6, the deletion of submitted file at assignment is allowed. The message "Nothing was submitted" would not be prompted.
Please advise if there is any setting to allow the deletion in Moodle 3.6.1. Or, Is it really a software bug at this Moodle version?
Thank you very much.