luceos Thank you. Actually, my Admin
role could upload files while my User
role could not, so I realized that I had to update permissions in the Permission page
of the Admin panel. Maybe this extra installation/configuration step should be added in the FriendsOfFlarum FAQ
I've also been trying to upload PDF files with this:
(image\/(gif|jpeg|png))|(application\/(x-(7z|rar)-compressed|zip|arj|x-(bzip2|gzip|lha|stuffit|tar)|pdf))
But it didn't work. What string should I use if I only want images and pdf files?