Trying to download a subtitle (by hash or by name) with VLsub never finish.
The error with vlc -vvv is :
lua generic warning: Error while running script /usr/local/lib/vlc/lua/extensions/VLSub.luac, function (null)(): lua/extensions/VLSub.lua:1441: VLC lua error in file lua/libs/stream.c line 117 (function vlclua_directory_stream_new)
lua generic warning: Could not translate click
VLC version is 3.0.12, VLsub is 0.11.1 (found with Control-M). A github issue suggests adding more compile flags to solve the issue : https://github.com/exebetche/vlsub/issues/207#issuecomment-511153161