VLSub is not working when VLC is playing media from http URL

VLC media player - 3.0.8 Vetinari

on Windows 10 Pro 1809

VLsub version 0.11.0 (packed with VLC)

When playing media from http URL I cannot open VLsub extension

In log I see this error:

[000002a7de997e90] qt interface debug: activating or triggering extension 'VLsub 0.11.0'
[000002a7deaa8440] lua generic debug: Activating extension 'VLsub 0.11.0'
[000002a7deaa8440] lua generic debug: [VLsub] Welcome
[000002a7deaa8440] lua generic debug: [VLSub] Working directory: C:\Users\izderadi\AppData\Roaming\vlc\lua\extensions\userdata\vlsub
[000002a7deaa8440] lua generic debug: [VLSub] Loading config file: C:\Users\izderadi\AppData\Roaming\vlc\lua\extensions\userdata\vlsub\vlsub_conf.xml
[000002a7deaa8440] lua generic debug: [VLSub] Video URI: http://127.0.0.1:5001/cisaruv-pekar-1951-1480x1080-hd%28pHorqjfZmOPB%29/cisaruv-pekar-1951-1480x1080-hd.mp4
[000002a7deaa8440] lua generic warning: Error while running script C:\Program Files\VideoLAN\VLC\lua\extensions\VLSub.luac, function activate(): ...ackage/win32/../../../share/lua/extensions/VLSub.lua:1244: bad argument [#1](https://code.videolan.org/videolan/vlc/-/issues/1) to 'gsub' (string expected, got nil)
[000002a7deaa8440] lua generic error: Could not activate extension!
[000002a7deaa8440] lua generic debug: Deactivating 'VLsub 0.11.0'

For local files playback and if there is no active media file VLsub works fine.