My Channel -> Manage torrents -> + Add -> Create -> Create .torrent(s)
I can make .torrent file if the file or folder has English name. But if the files or folders have Korean name, Tribler can’t hash them. I think Chinese and Japanese file or folder names also have a same problem because East Asian characters usually have the problem when East Asians try to use some Western softwares.
(I use Tribler 6.5.2.)