Cubase 12 no longer started after installing 12.0.20

I started C12 today to work as usual, but I noticed an update was available, so I installed. I couldn’t make it work since then. I re-installed the update (12.0.20), but nothing change. I triwd to start without 3rd party plugins, but problem i sstill there… I don’t know what should I do now… ¡¡¡