We really nead help with this. Our Moodle 2.3.2 has been displaying this error message "The file ... has no data in it - did you try to upload a folder?".
It has no apparent cause. It happens randomly to any teacher or student. Sometimes Moodle allows you to upload 3 or 4 files before displaying the error, other time the error displays in the first file that you try to upload and then you cannot upload anything else OR sometimes if you are persistant Moodle will accept the file after a few tries. I can assure that the files are not empty. This is applicable to drag-and-drop upload or regular upload method.
This is causing our school A TON of constraints. Can anyone please help identifying the possible source of the problem?