Carla vst options are greyed out

I am not new to this forum if I remember correctly.
But maybe my old account was deleted.
So mine is a new fresh account. And this is my first post.

I would like to use my Manjaro installation (I am running the rt kernel) for music, that is, use a DAW with vst plugins.

On my system I have Reaper linux, Jack, Wine, Carla, SampleTank2.
Just cannot add the SampleTank vst (in Wine folders under drive_c) to Carla.
The experimental features are set, but the scan is not able to find the vst. I see that vst options are greyed out.

If you know what to do, please let me know.
Thanks in advance