Thanks for response.
So I had Turbine Beta plugins already and applied ListBox patch but it didn't help (also I doubt it's needed reading it's description). I didn't modify any files in plugin, I also figured it needs to be in Galphoglas folder and placed it there. It's trying to load because it reads main.lua but it stops at line 71 which is:
I wondered what is tradcanal and found it in line 22:
Unfortunately I don't know what it means.
To be clear I use English client, I also placed world/lff/trade channels in separate tab, but enabling for example world in general chat doesn't help. I downloaded and installed current 1.2.5 version from plugin page in French, I hope it's also good for English client.
I'm using several other plugins and I'm also IT specialist, just not programmer, so I think it's unlikely I installed it wrong or something like that