the error dissapeared when i ran the examples withouth using sudo, but
as plain user.
i was alse having problems as root. So just try as user.
im having other errors related to some python libs and the size/scale
of the objetcs to be displayed inside the windows that dissapear in
the sides and is impossible to scroll to them, since there is no
scroll on the created windows…
i will try to open more specific threads later today.