TGuitar, voices missing in Chords mode

When I go to the Chords mode.
Beneath the guitar picture, there should be the “voices” so you can modify each chord.
In my situation, there are none.
I can’t find the reason why.
I’m using Halion Sonic SE3 (version 3.4)
Is there some sort of ristriction?
I donwloaded TGuitar yesterday, so I suppose it is a recent and up-to-date version.
Is there somebody in a simular situation and is there a fix for this?