Ok I did all from the scratch. Connect by ethernet (because using the wifi somehow I was losing the connection when connecting) > connect to the Hotel WiFi AP and then I got the banner you were referring, he automatically redirect me to the login portal and working like a charm.
One question regarding this update, I understood is kind of temporary until this is moved to the stable releases? so I should stay until new stable release is drop ?
in paralel many thanks for your quick support to sort out this issue