I just registered and tried a attachment and it works for me.
One Item I did notice it seems to be very slow uploading so possibly you clicked on done before it completed.
Also it took a few moments before it would let me download the attachment.
Replies are turned off on your original link.
So I would compare the permissions between the two forum.
The test link forum in your initial post and the one that isaac and I used.
I did not use drag and drop for file selection I used browse.
FYI,
You can delete my post after testing.
Last edited by Ruben; 04/07/2018 11:04 AM.
