It means that a launch of a project requires the change out of the entire web interface to hook into the new project feeder setup, what is commonly internally referred to as a web-build. When that's happening, there is intermittent outage on the website. Sometimes announced, sometimes not like the last go-live... it just happened with a big bang ;>)

What I did was exactly this ;

Tick the Beta box for the correct device profile ( default )

Supppose that is enough isn´t and no need to tick every profile.

Those are with a tick for all Projects, etc etc