Voxin voice not working any more

Dear all,

After a recent update of my system, Voxin's Vocalizer voice stopped
working, but IBMTTS still works.

As I am not sure this is worth an issue I prefer to ask here before
potentially opening one.

I did look at the logs but didn't find anything really relevant, except
that the Voxin module seems unable to open the audio device (pulse) but
I cannot understand why this is so because others applications are able
to and given that both speech-dispatcher and those applications are run
as user.

Exactly the same situation with speech-dispatcher run as root and
re-installing Voxin didn't change anything.

I am lacking inspiration new and would welcome any suggestion.

Many thanks in advance,

Seb.