Viveza 5.0 - bug in Photoshop 19.1.5 - HighSierra 10.13.6

What I want to be fixed in Nik Collection ?
I would like just to be able to use Viveza !!!
In my configuration, Viveza is working NOT AT ALL : not working from the filters menu, not working from the palette and not working as a standalone app. !!!
I’ve been using this plug-in for years before it was developed by DXO. It worked very well.
I would like to know if I am the only one user to experience such an issue with this plug-in.
No window is opening (like for all other plug-ins of the suite) and of course it’s impossible
to create u-points inside Viveza.